Showing 10 of 129 results
We present results on strange and multi-strange particle production in Au+Au collisions at $\sqrt{s_{NN}}=62.4$ GeV as measured with the STAR detector at RHIC. Mid-rapidity transverse momentum spectra and integrated yields of $K^{0}_{S}$, $\Lambda$, $\Xi$, $\Omega$ and their anti-particles are presented for different centrality classes. The particle yields and ratios follow a smooth energy dependence. Chemical freeze-out parameters, temperature, baryon chemical potential and strangeness saturation factor obtained from the particle yields are presented. Intermediate transverse momentum ($p_T$) phenomena are discussed based on the ratio of the measured baryon-to-meson spectra and nuclear modification factor. The centrality dependence of various measurements presented show a similar behavior as seen in Au+Au collisions at $\sqrt{s_{NN}}=200$ GeV.
Correction factors (acceptance × efficiency) for the most central events ( 0−5% for KS0, Λ and Ξ; 0−20% for Ω) at mid-rapidity (|y| < 1) as a function of pT for the different particle species as obtained via embedding. The branching ratio of the measured decay channel is not factored into this plot.
Efficiency corrected pT spectra for the different centrality bins and for the various particles. Note that 7 centrality bins have been used for the KS0 and the Λ while only 6 and 3 have been used for the Ξ and Ω, respectively. Errors are statistical only. The Λ spectra are corrected for the feed-down of the Ξ decay.
Efficiency corrected pT spectra for the different centrality bins and for the various particles. Note that 7 centrality bins have been used for the KS0 and the Λ while only 6 and 3 have been used for the Ξ and Ω, respectively. Errors are statistical only. The Λ spectra are corrected for the feed-down of the Ξ decay.
Efficiency corrected pT spectra for the different centrality bins and for the various particles. Note that 7 centrality bins have been used for the KS0 and the Λ while only 6 and 3 have been used for the Ξ and Ω, respectively. Errors are statistical only. The Λ spectra are corrected for the feed-down of the Ξ decay.
Efficiency corrected pT spectra for the different centrality bins and for the various particles. Note that 7 centrality bins have been used for the KS0 and the Λ while only 6 and 3 have been used for the Ξ and Ω, respectively. Errors are statistical only. The Λ spectra are corrected for the feed-down of the Ξ decay.
Efficiency corrected pT spectra for the different centrality bins and for the various particles. Note that 7 centrality bins have been used for the KS0 and the Λ while only 6 and 3 have been used for the Ξ and Ω, respectively. Errors are statistical only. The Λ spectra are corrected for the feed-down of the Ξ decay.
Efficiency corrected pT spectra for the different centrality bins and for the various particles. Note that 7 centrality bins have been used for the KS0 and the Λ while only 6 and 3 have been used for the Ξ and Ω, respectively. Errors are statistical only. The Λ spectra are corrected for the feed-down of the Ξ decay.
Efficiency corrected pT spectra for the different centrality bins and for the various particles. Note that 7 centrality bins have been used for the KS0 and the Λ while only 6 and 3 have been used for the Ξ and Ω, respectively. Errors are statistical only. The Λ spectra are corrected for the feed-down of the Ξ decay.
Extrapolated average transverse momenta ⟨pT ⟩ as a function of dNch/dy for different particle species in Au+Au collisions at 62.4 GeV. Statistical uncertainties are represented by the error bars at the points while the systematic uncertainties are represented by the gray bars. The π, charged K and p data were extracted from Ref. [14].
KS0 dN/dpT spectra compared to the charged Kaon spectra for the event centrality of 0-5% and 30-40%. The charged Kaons data points are for rapidity range of |y| < 0.1 and were extracted from Ref. [14].
KS0 dN/dpT spectra compared to the charged Kaon spectra for the event centrality of 0-5% and 30-40%. The charged Kaons data points are for rapidity range of |y| < 0.1 and were extracted from Ref. [14].
Strange particle production yields at mid-rapidity in central Au+Au and Pb+Pb collisions versus the center of mass energy √sNN. The top panel shows results for K0S and Λ. The AGS values are from E896 [1] (centrality 0 − 5 %). The SPS values are from NA49 [20] (centrality 0 − 7 %) and the RHIC values are from STAR [4, 15] (centrality 0 − 5 %). For the multi-strange baryons Ξ and Ω (bottom panel), the SPS results are from NA57 [2] (centrality 0 − 11 %) and the RHIC values are from STAR [15, 21] (centrality 0 − 20 %).
Strange particle production yields at mid-rapidity in central Au+Au and Pb+Pb collisions versus the center of mass energy √sNN. The top panel shows results for K0S and Λ. The AGS values are from E896 [1] (centrality 0 − 5 %). The SPS values are from NA49 [20] (centrality 0 − 7 %) and the RHIC values are from STAR [4, 15] (centrality 0 − 5 %). For the multi-strange baryons Ξ and Ω (bottom panel), the SPS results are from NA57 [2] (centrality 0 − 11 %) and the RHIC values are from STAR [15, 21] (centrality 0 − 20 %).
Anti-baryon to baryon yield ratios for strange baryons versus the center of mass energy √sNN. Λ/Λ is shown in the top panel while the multi-strange baryons are on the bottom panel. The data from AGS are not corrected for the weak decay feed-down from the multistrange baryons while the data from SPS and RHIC are corrected. The lines are the results of a thermal model calculation (see text section IV A). The AGS values are from E896 [1] (centrality 0 − 5 %). The SPS values are from NA49 [20] (centrality 0 − 7 %) and the RHIC values are from STAR [4, 15] (centrality 0 − 5 %). For the multi- strange baryons Ξ and Ω (bottom panel), the SPS results are from NA57 [2] (centrality 0 − 11 %) and the RHIC values are from STAR [15, 21] (centrality 0 − 20 %).
Antibaryon-to-baryon yield ratios for strange particles and protons as a function of dNch/dy at √sNN=62.4 and 200 GeV. The p data were extracted from Ref. [14]. The √sNN=200 GeV strange hadron data were extracted from Ref. [15].
Particle-yield ratios as obtained by measurements (black dots) for the most central (0–5%) Au+Au collisions at 62.4 GeV and statistical model predictions (lines). The ratios indicated by the dashed lines (blue) were obtained by using only π, K, and protons, whereas the ratios indicated by the full lines (green) were obtained by also using the hyperons in the fit.
Chemical freeze-out temperature Tch (a) and strangeness saturation factor γs (b) as a function of the mean number of participants.
Chemical freeze-out temperature Tch (a) and strangeness saturation factor γs (b) as a function of the mean number of participants.
Temperature and baryon chemical potential obtained from thermal model fits as a function of √sNN (see Ref. [22]). The dashed lines correspond to the parametrizations given in Ref. [22]. The solid stars show the result for √sNN=62.4 and 200 GeV.
Temperature and baryon chemical potential obtained from thermal model fits as a function of √sNN (see Ref. [22]). The dashed lines correspond to the parametrizations given in Ref. [22]. The solid stars show the result for √sNN=62.4 and 200 GeV.
Ratio of baryon (solid symbols) and antibaryon (open symbols) to π+ as a function of dNch/dy for √sNN=62.4 GeV (left) and √sNN=200 GeV (right). The π and p data were extracted from Ref. [14].
Ratio of baryon (solid symbols) and antibaryon (open symbols) to π+ as a function of dNch/dy for √sNN=62.4 GeV (left) and √sNN=200 GeV (right). The π and p data were extracted from Ref. [14].
Ratio of baryon (solid symbols) and antibaryon (open symbols) to π+ as a function of dNch/dy for √sNN=62.4 GeV (left) and √sNN=200 GeV (right). The π and p data were extracted from Ref. [14].
Ratio of baryon (solid symbols) and antibaryon (open symbols) to π+ as a function of dNch/dy for √sNN=62.4 GeV (left) and √sNN=200 GeV (right). The π and p data were extracted from Ref. [14].
Ratio of baryon (solid symbols) and antibaryon (open symbols) to π− as a function of √sNN. The lines are the results of the thermal model calculation (see text Sec. 4a). The SPS values are from NA49 [20] (centrality 0–7%) and the RHIC values are from STAR [4, 15] (centrality 0–5%). For the multistrange baryons Ξ and Ω (bottom), the SPS results are from NA57 [2] (centrality 0–11%) and the RHIC values are from STAR [15, 21] (centrality 0–20%).
Nuclear modification factor RCP, calculated as the ratio between 0–10% central spectra and 40–80% peripheral spectra, for π, K0S, Λ, and Ξ particles in Au+Au collisions at 62.4 GeV. The π RCP values were extracted from Ref. [10]. The gray band on the right side of the plot shows the uncertainties on the estimation of the number of binary collisions and the gray band on the lower left side indicates the uncertainties on the number of participants.
Nuclear modification factor RCP, calculated as the ratio between 0–5% central spectra and 40–60% peripheral spectra, for Λ and Ξ particles measured in Au + Au collisions at 62.4 GeV. The gray band corresponds to the equivalent RCP curve for the Λ particles measured in Au+Au collisions at 200 GeV [15].
Λ/K0S ratio as a function of transverse momentum for different centrality classes. 0–5% (solid circles), 40–60% (open squares), and 60–80% (solid triangles) in Au+Au collisions at 62.4 GeV.
Maximum value of the Λ/K0S ratio from Au+Au collisions at 62.4 GeV (solid circles) and 200 GeV (open circles) [11] as a function of ⟨Npart⟩ for different centrality classes. The lowest ⟨Npart⟩ point corresponds to p+p collisions at 200 GeV [44]. The maximum of the Λ––/K0S from Au+Au collisions at 62.4 GeV is shown as solid triangles.
The extreme temperatures and energy densities generated by ultra-relativistic collisions between heavy nuclei produce a state of matter with surprising fluid properties. Non-central collisions have angular momentum on the order of 1000$\hbar$, and the resulting fluid may have a strong vortical structure that must be understood to properly describe the fluid. It is also of particular interest because the restoration of fundamental symmetries of quantum chromodynamics is expected to produce novel physical effects in the presence of strong vorticity. However, no experimental indications of fluid vorticity in heavy ion collisions have so far been found. Here we present the first measurement of an alignment between the angular momentum of a non-central collision and the spin of emitted particles, revealing that the fluid produced in heavy ion collisions is by far the most vortical system ever observed. We find that $\Lambda$ and $\overline{\Lambda}$ hyperons show a positive polarization of the order of a few percent, consistent with some hydrodynamic predictions. A previous measurement that reported a null result at higher collision energies is seen to be consistent with the trend of our new observations, though with larger statistical uncertainties. These data provide the first experimental access to the vortical structure of the "perfect fluid" created in a heavy ion collision. They should prove valuable in the development of hydrodynamic models that quantitatively connect observations to the theory of the Strong Force. Our results extend the recent discovery of hydrodynamic spin alignment to the subatomic realm.
Lambda and AntiLambda polarization as a function of collision energy. A 0.8% error on the alpha value used in the paper is corrected in this table. Systematic error bars include those associated with particle identification (negligible), uncertainty in the value of the hyperon decay parameter (2%) and reaction plane resolution (2%) and detector efficiency corrections (4%). The dominant systematic error comes from statistical fluctuations of the estimated combinatoric background under the (anti-)$\Lambda$ mass peak.
Lambda and AntiLambda polarization as a function of collision energy calculated using the new $\alpha_\Lambda=0.732$ updated on PDG2020. Systematic error bars include those associated with particle identification (negligible), uncertainty in the value of the hyperon decay parameter (2%) and reaction plane resolution (2%) and detector efficiency corrections (4%). The dominant systematic error comes from statistical fluctuations of the estimated combinatoric background under the (anti-)$\Lambda$ mass peak.
Elliptic flow (v_2) values for identified particles at midrapidity in Au + Au collisions measured by the STAR experiment in the Beam Energy Scan at the Relativistic Heavy Ion Collider at sqrt{s_{NN}}= 7.7--62.4 GeV are presented for three centrality classes. The centrality dependence and the data at sqrt{s_{NN}}= 14.5 GeV are new. Except at the lowest beam energies we observe a similar relative v_2 baryon-meson splitting for all centrality classes which is in agreement within 15% with the number-of-constituent quark scaling. The larger v_2 for most particles relative to antiparticles, already observed for minimum bias collisions, shows a clear centrality dependence, with the largest difference for the most central collisions. Also, the results are compared with A Multiphase Transport Model and fit with a Blast Wave model.
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The difference in $v_{2}$ between particles (X) and their corresponding antiparticles $\bar{X}$ (see legend) as a function of $\sqrt{s_{NN}}$ for 10%-40% central Au + Au collisions. The systematic errors are shown by the hooked error bars. The dashed lines in the plot are fits with a power-law function.
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The difference in $v_{2}$ between protons and antiprotons as a function of $\sqrt{s_{NN}}$ for 0%-10%, 10%-40% and 40%-80% central Au + Au collisions. The systematic errors are shown by the hooked error bars. The dashed lines in the plot are fits with a power-law function.
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The relative difference. The systematic errors are shown by the hooked error bars. The dashed lines in the plot are fits with a power-law function.
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The $v_{2}$ difference between protons and antiprotons (and between $\pi^{+}$ and $pi^{-}$) for 10%-40% centrality Au+Au collisions at 7.7, 11.5, 14.5, and 19.6 GeV. The $v_{2}{BBC} results were slightly shifted horizontally.
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We report on K*0 production at mid-rapidity in Au+Au and Cu+Cu collisions at \sqrt{s_{NN}} = 62.4 and 200 GeV collected by the Solenoid Tracker at RHIC (STAR) detector. The K*0 is reconstructed via the hadronic decays K*0 \to K+ pi- and \bar{K*0} \to K-pi+. Transverse momentum, pT, spectra are measured over a range of pT extending from 0.2 GeV/c to 5 GeV/c. The center of mass energy and system size dependence of the rapidity density, dN/dy, and the average transverse momentum, <pT>, are presented. The measured N(K*0)/N(K) and N(\phi)/N(K*0) ratios favor the dominance of re-scattering of decay daughters of K*0 over the hadronic regeneration for the K*0 production. In the intermediate pT region (2.0 < pT < 4.0 GeV/c), the elliptic flow parameter, v2, and the nuclear modification factor, RCP, agree with the expectations from the quark coalescence model of particle production.
The K$\pi$ pair invariant mass distribution integrated over the $K^{*0}$ $p_T$ for minimum bias Au+Au collisions at $\sqrt{s_{NN}}$ =200 GeV after mixed-event background subtraction.
The K$\pi$ pair invariant mass distribution integrated over the $K^{*0}$ $p_T$ for minimum bias Au+Au collisions at $\sqrt{s_{NN}}$ =62.4 GeV after mixed-event background subtraction.
The K$\pi$ pair invariant mass distribution integrated over the $K^{*0}$ $p_T$ for minimum bias Cu+Cu collisions at $\sqrt{s_{NN}}$ =200 GeV after mixed-event background subtraction.
The K$\pi$ pair invariant mass distribution integrated over the $K^{*0}$ $p_T$ for minimum bias Cu+Cu collisions at $\sqrt{s_{NN}}$ =62.4 GeV after mixed-event background subtraction.
The Kπ pair invariant mass distribution for various pT bins (top left) pT = 0.4–0.6 GeV/c in Au+Au collisions at √sNN = 200 GeV after the mixed-event background subtraction.
The Kπ pair invariant mass distribution for various pT bins (top right) pT = 0.6–0.8 GeV/c in Au+Au collisions at √sNN = 62.4 GeV after the mixed-event background subtraction.
The Kπ pair invariant mass distribution for various pT bins (bottom left) pT = 0.8–1.0 GeV/c in Au+Au collisions at √sNN = 200 GeV after the mixed-event background subtraction.
The Kπ pair invariant mass distribution for various pT bins (bottom right) pT = 1.0–1.2 GeV/c in Au+Au collisions at √sNN = 62.4 GeV after the mixed-event background subtraction.
The signal-to-background ratio for $K^{*0}$ measurements as a function of $p_T$ for different collision centrality bins (0-10%, 10-40%, 40-60%, 60-80%) in Au+Au collisions at 200 GeV.
$K^{*0}$ mass as a function of $p_T$ for minimum bias Au+Au collisions at $\sqrt{s_{NN}}$ = 62.4 GeV.
$K^{*0}$ mass as a function of $p_T$ for minimum bias Au+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV.
$K^{*0}$ mass as a function of $p_T$ for minimum bias Cu+Cu collisions at $\sqrt{s_{NN}}$ = 62.4 GeV
$K^{*0}$ mass as a function of $p_T$ for minimum bias Cu+Cu collisions at $\sqrt{s_{NN}}$ = 200 GeV
$K^{*0}$ width as a function of $p_T$ for minimum bias Au+Au collisions at $\sqrt{s_{NN}}$ = 62.4 GeV
$K^{*0}$ width as a function of $p_T$ for minimum bias Au+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV
$K^{*0}$ width as a function of $p_T$ for minimum bias Cu+Cu collisions at $\sqrt{s_{NN}}$ = 62.4 GeV
$K^{*0}$ width as a function of $p_T$ for minimum bias Cu+Cu collisions at $\sqrt{s_{NN}}$ = 200 GeV
The $K^{*0}$ reconstruction efficiency multiplied by the detector acceptance as a function of $p_T$ in Au+Au (|$\eta$| < 0.8) collisions at 200 GeV for different collision centrality bins (0-20% ,20-40% , 40-60%)
The $K^{*0}$ reconstruction efficiency multiplied by the detector acceptance as a function of $p_T$ in Cu+Cu (|$\eta$| < 1.0) collisions at 200 GeV for different collision centrality bins (0-20% ,20-40% , 40-60%)
Mid-rapidity $K^{*0}$ $p_T$ spectra for various collision centrality bins (0-20%, 20-40%, 40-60%, 60-80%) in Au+Au collisions at $\sqrt{s_{NN}}$ = 62.4 GeV
Mid-rapidity $K^{*0}$ $p_T$ spectra for various collision centrality bins (0-20%, 20-40%, 40-60%) in Cu+Cu collisions at $\sqrt{s_{NN}}$ = 62.4 GeV
Mid-rapidity $K^{*0}$ $p_T$ spectra for various collision centrality bins (0-20%, 20-40%, 40-60%, 60-80%) in Au+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV
Mid-rapidity $K^{*0}$ $p_T$ spectra for various collision centrality bins (0-20%, 20-40%, 40-60%) in Cu+Cu collisions at $\sqrt{s_{NN}}$ = 200 GeV
The mid-rapidity yields dN/dy of $K^{*0}$ as a function of the average number of participating nucleons, $⟨N_{part}⟩$, for Au+Au collisions at $\sqrt{s_{NN}}$ = 62.4 GeV
The mid-rapidity yields dN/dy of $K^{*0}$ as a function of the average number of participating nucleons, $⟨N_{part}⟩$, for Cu+Cu collisions at $\sqrt{s_{NN}}$ = 62.4 GeV
The mid-rapidity yields dN/dy of $K^{*0}$ as a function of the average number of participating nucleons, $⟨N_{part}⟩$, for Au+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV
The mid-rapidity yields dN/dy of $K^{*0}$ as a function of the average number of participating nucleons, $⟨N_{part}⟩$, for Cu+Cu collisions at $\sqrt{s_{NN}}$ = 200 GeV
The mid-rapidity $K^{*0}$ $⟨p_T⟩$ as a function $⟨N_{part}⟩$ for Au+Au collisions at $\sqrt{s_{NN}}$ = 62.4 GeV
The mid-rapidity $K^{*0}$ $⟨p_T⟩$ as a function $⟨N_{part}⟩$ for Cu+Cu collisions at $\sqrt{s_{NN}}$ = 62.4 GeV
The mid-rapidity $K^{*0}$ $⟨p_T⟩$ as a function $⟨N_{part}⟩$ for Au+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV
The mid-rapidity $K^{*0}$ $⟨p_T⟩$ as a function $⟨N_{part}⟩$ for Cu+Cu collisions at $\sqrt{s_{NN}}$ = 200 GeV
The mid-rapidity $⟨p_T⟩$ of $\pi$, K, p and $K^{*0}$ as a function of $⟨N_{part}⟩$ for Au+Au collisions at $\sqrt{s_{NN}}$ = 62.4 GeV.
Mid-rapidity $N(K^{*0})/N(K^-)$ ratio for Au+Au at $\sqrt{s_{NN}}$ = 62.4 GeV as a function of $⟨N_{part}⟩$
Mid-rapidity $N(K^{*0})/N(K^-)$ ratio for Cu+Cu at $\sqrt{s_{NN}}$ = 62.4 GeV as a function of $⟨N_{part}⟩$
Mid-rapidity $N(K^{*0})/N(K^-)$ ratio for Au+Au at $\sqrt{s_{NN}}$ = 200 GeV as a function of $⟨N_{part}⟩$
Mid-rapidity $N(K^{*0})/N(K^-)$ ratio for Cu+Cu at $\sqrt{s_{NN}}$ = 200 GeV as a function of $⟨N_{part}⟩$
Mid-rapidity $N(K^{*0})N(K^-)$ in Au+Au collisions divided by $N(K^{*0})N(K^-)$ ratio in p+p collisions at $\sqrt{s_{NN}}$=200 GeV as a function of $⟨N_{part}⟩$.
Mid-rapidity $N(K^{*0})N(K^-)$ in Cu+Cu collisions divided by $N(K^{*0})N(K^-)$ ratio in p+p collisions at $\sqrt{s_{NN}}$=200 GeV as a function of $⟨N_{part}⟩$
Mid-rapidity $N(K^{*0})N(K^-)$ in d+Au collisions divided by $N(K^{*0})N(K^-)$ ratio in d+Au collisions at $\sqrt{s_{NN}}$=200 GeV as a function of $⟨N_{part}⟩$
Mid-rapidity $N(K^{*0})/N(K^-)$ ratio in minimum bias Au+Au collisions as a function of $\sqrt{s_{NN}}.
Mid-rapidity $N(K^{*0})/N(K^-)$ ratio in minimum bias Cu+Cu collisions as a function of $\sqrt{s_{NN}}.
Mid-rapidity $N(K^{*0})/N(K^-)$ ratio in minimum bias p+p collisions as a function of $\sqrt{s_{NN}}.
Mid-rapidity $N(K^{*0})/N(K^-)$ ratio in minimum bias Au+Au collisions as a function of $\sqrt{s_{NN}}.
Mid-rapidity $N(K^{*0})/N(K^-)$ ratio in minimum bias Cu+Cu collisions as a function of $\sqrt{s_{NN}}.
Mid-rapidity $N(K^{*0})/N(K^-)$ ratio in minimum bias p+p collisions as a function of $\sqrt{s_{NN}}.
Mid-rapidity $N(\phi)/N(K^{*0})$ ratio for Au+Au at $\sqrt{s_{NN}}$ = 62.4 GeV as a function of $⟨N_{part}⟩$
Mid-rapidity $N(\phi)/N(K^{*0})$ ratio for Cu+Cu at $\sqrt{s_{NN}}$ = 62.4 GeV as a function of $⟨N_{part}⟩$
Mid-rapidity $N(\phi)/N(K^{*0})$ ratio for Au+Au at $\sqrt{s_{NN}}$ = 200 GeV as a function of $⟨N_{part}⟩$
Mid-rapidity $N(\phi)/N(K^{*0})$ ratio for Cu+Cu at $\sqrt{s_{NN}}$ = 200 GeV as a function of $⟨N_{part}⟩$
Mid-rapidity $[N(\phi)/N(K^{*0})]$ in Au+Au collisions divided by $[N(\phi)/N(K^{*0})]$ ratio in p+p collisions at $\sqrt{s_{NN}}$=200 GeV as a function of $⟨N_{part}⟩$
Mid-rapidity $[N(\phi)/N(K^{*0})]$ in Cu+Cu collisions divided by $[N(\phi)/N(K^{*0})]$ ratio in p+p collisions at $\sqrt{s_{NN}}$=200 GeV as a function of $⟨N_{part}⟩$
Mid-rapidity $[N(\phi)/N(K^{*0})]$ in d+Au collisions divided by $[N(\phi)/N(K^{*0})]$ ratio in p+p collisions at $\sqrt{s_{NN}}$=200 GeV as a function of $⟨N_{part}⟩$
Mid-rapidity $N(\phi)/N(K^{*0})$ ratio in minimum bias Au+Au collisions as a function of $\sqrt{s_{NN}}$.
Mid-rapidity $N(\phi)/N(K^{*0})$ ratio in minimum bias Cu+Cu collisions as a function of $\sqrt{s_{NN}}$.
Mid-rapidity $N(\phi)/N(K^{*0})$ ratio in minimum bias p+p collisions as a function of $\sqrt{s_{NN}}$.
Mid-rapidity $N(\phi)/N(K^{*0})$ ratio in minimum bias Au+Au collisions as a function of $\sqrt{s_{NN}}$.
Mid-rapidity $N(\phi)/N(K^{*0})$ ratio in minimum bias Cu+Cu collisions as a function of $\sqrt{s_{NN}}$.
Mid-rapidity $N(\phi)/N(K^{*0})$ ratio in minimum bias p+p collisions as a function of $\sqrt{s_{NN}}$.
The $K^{*0}$ $v_2$ (Run IV) as a function of $p_T$ in minimum bias Au+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV.
The $K^{*0}$ $v_2$ (Run II) as a function of $p_T$ in minimum bias Au+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV.
The $K^{*0}$ $R_{CP}$ as a function of $p_T$ in Au+Au collisions at 62.4 and 200 GeV compared to the $R_{CP}$ of $K^0_S$ and $\Lambda$ at 200 GeV.
The $K^{*0}$ $R_{CP}$ as a function of $p_T$ in Au+Au collisions at 62.4 and 200 GeV compared to the $R_{CP}$ of $K^0_S$ and $\Lambda$ at 200 GeV.
The $K^{*0}$ $R_{CP}$ as a function of $p_T$ in Au+Au collisions at 62.4 and 200 GeV compared to the $R_{CP}$ of $K^0_S$ and $\Lambda$ at 200 GeV.
The $K^{*0}$ ~$R_{CP}$~ as a function of $p_T$ in Au+Au collisions at 62.4 and 200 GeV compared to the $R_{CP}$ of $K^0_S$ and $\Lambda$ at 200 GeV.
Measurements of the elliptic flow, $v_{2}$, of identified hadrons ($\pi^{\pm}$, $K^{\pm}$, $K_{s}^{0}$, $p$, $\bar{p}$, $\phi$, $\Lambda$, $\bar{\Lambda}$, $\Xi^{-}$, $\bar{\Xi}^{+}$, $\Omega^{-}$, $\bar{\Omega}^{+}$) in Au+Au collisions at $\sqrt{s_{NN}}=$ 7.7, 11.5, 19.6, 27, 39 and 62.4 GeV are presented. The measurements were done at mid-rapidity using the Time Projection Chamber and the Time-of-Flight detectors of the STAR experiment during the Beam Energy Scan program at RHIC. A significant difference in the $v_{2}$ values for particles and the corresponding anti-particles was observed at all transverse momenta for the first time. The difference increases with decreasing center-of-mass energy, $\sqrt{s_{NN}}$ (or increasing baryon chemical potential, $\mu_{B}$) and is larger for the baryons as compared to the mesons. This implies that particles and anti-particles are no longer consistent with the universal number-of-constituent quark (NCQ) scaling of $v_{2}$ that was observed at $\sqrt{s_{NN}}=$ 200 GeV. However, for the group of particles NCQ scaling at $(m_{T}-m_{0})/n_{q}>$ 0.4 GeV/$c^{2}$ is not violated within $\pm$10%. The $v_{2}$ values for $\phi$ mesons at 7.7 and 11.5 GeV are approximately two standard deviations from the trend defined by the other hadrons at the highest measured $p_{T}$ values.
The elliptic flow,v_2, as a function of the transverse momentum,p_T, from 0–80% central Au+Au collisions for various particle species and energies.
The elliptic flow,v_2, as a function of the transverse momentum,p_T, from 0–80% central Au+Au collisions for various particle species and energies.
The elliptic flow,v_2, as a function of the transverse momentum,p_T, from 0–80% central Au+Au collisions for various particle species and energies.
The elliptic flow,v_2, as a function of the transverse momentum,p_T, from 0–80% central Au+Au collisions for various particle species and energies.
The elliptic flow,v_2, as a function of the transverse momentum,p_T, from 0–80% central Au+Au collisions for various particle species and energies.
The elliptic flow,v_2, as a function of the transverse momentum,p_T, from 0–80% central Au+Au collisions for various particle species and energies.
The elliptic flow,v_2, as a function of the transverse momentum,p_T, from 0–80% central Au+Au collisions for various particle species and energies.
The elliptic flow,v_2, as a function of the transverse momentum,p_T, from 0–80% central Au+Au collisions for various particle species and energies.
The elliptic flow,v_2, as a function of the transverse momentum,p_T, from 0–80% central Au+Au collisions for various particle species and energies.
The elliptic flow,v_2, as a function of the transverse momentum,p_T, from 0–80% central Au+Au collisions for various particle species and energies.
The elliptic flow,v_2, as a function of the transverse momentum,p_T, from 0–80% central Au+Au collisions for various particle species and energies.
The elliptic flow,v_2, as a function of the transverse momentum,p_T, from 0–80% central Au+Au collisions for various particle species and energies.
The elliptic flow,v_2, as a function of the transverse momentum,p_T, from 0–80% central Au+Au collisions for various particle species and energies.
The elliptic flow,v_2, as a function of the transverse momentum,p_T, from 0–80% central Au+Au collisions for various particle species and energies.
The elliptic flow,v_2, as a function of the transverse momentum,p_T, from 0–80% central Au+Au collisions for various particle species and energies.
The elliptic flow,v_2, as a function of the transverse momentum,p_T, from 0–80% central Au+Au collisions for various particle species and energies.
The elliptic flow,v_2, as a function of the transverse momentum,p_T, from 0–80% central Au+Au collisions for various particle species and energies.
The elliptic flow,v_2, as a function of the transverse momentum,p_T, from 0–80% central Au+Au collisions for various particle species and energies.
The elliptic flow,v_2, as a function of the transverse momentum,p_T, from 0–80% central Au+Au collisions for various particle species and energies.
The elliptic flow,v_2, as a function of the transverse momentum,p_T, from 0–80% central Au+Au collisions for various particle species and energies.
The elliptic flow,v_2, as a function of the transverse momentum,p_T, from 0–80% central Au+Au collisions for various particle species and energies.
The elliptic flow,v_2, as a function of the transverse momentum,p_T, from 0–80% central Au+Au collisions for various particle species and energies.
The elliptic flow,v_2, as a function of the transverse momentum,p_T, from 0–80% central Au+Au collisions for various particle species and energies.
The elliptic flow,v_2, as a function of the transverse momentum,p_T, from 0–80% central Au+Au collisions for various particle species and energies.
The elliptic flow,v_2, as a function of the transverse momentum,p_T, from 0–80% central Au+Au collisions for various particle species and energies.
The elliptic flow,v_2, as a function of the transverse momentum,p_T, from 0–80% central Au+Au collisions for various particle species and energies.
The elliptic flow,v_2, as a function of the transverse momentum,p_T, from 0–80% central Au+Au collisions for various particle species and energies.
The elliptic flow,v_2, as a function of the transverse momentum,p_T, from 0–80% central Au+Au collisions for various particle species and energies.
The elliptic flow,v_2, as a function of the transverse momentum,p_T, from 0–80% central Au+Au collisions for various particle species and energies.
The elliptic flow,v_2, as a function of the transverse momentum, p_T, from 0–80% central Au+Au collisions for various particle species and energies.
The elliptic flow,v_2, as a function of the transverse momentum,p_T, from 0–80% central Au+Au collisions for various particle species and energies.
The elliptic flow,v_2, as a function of the transverse momentum,p_T, from 0–80% central Au+Au collisions for various particle species and energies.
The elliptic flow,v_2, as a function of the transverse momentum,p_T, from 0–80% central Au+Au collisions for various particle species and energies.
The elliptic flow,v_2, as a function of the transverse momentum,p_T, from 0–80% central Au+Au collisions for various particle species and energies.
The elliptic flow,v_2, as a function of the transverse momentum,p_T, from 0–80% central Au+Au collisions for various particle species and energies.
The elliptic flow,v_2, as a function of the transverse momentum,p_T, from 0–80% central Au+Au collisions for various particle species and energies.
The elliptic flow, v_2 (p_T), in 0–80% central Au+Au collisions for selected particles re plotted only for the transverse momentum range of 0.2< pT<1.6 GeV/c to emphasize the mass ordering at low p__T.
The elliptic flow, v_2 (p_T), in 0–80% central Au+Au collisions for selected particles re plotted only for the transverse momentum range of 0.2< pT<1.6 GeV/c to emphasize the mass ordering at low p__T.
The elliptic flow, v_2 (p_T), in 0–80% central Au+Au collisions for selected particles re plotted only for the transverse momentum range of 0.2< pT<1.6 GeV/c to emphasize the mass ordering at low p__T.
The elliptic flow, v_2 (p_T), in 0–80% central Au+Au collisions for selected particles re plotted only for the transverse momentum range of 0.2< pT<1.6 GeV/c to emphasize the mass ordering at low p__T.
The elliptic flow, v_2 (p_T), in 0–80% central Au+Au collisions for selected particles re plotted only for the transverse momentum range of 0.2< pT<1.6 GeV/c to emphasize the mass ordering at low p__T.
The elliptic flow, v_2 (p_T), in 0–80% central Au+Au collisions for selected particles re plotted only for the transverse momentum range of 0.2< pT<1.6 GeV/c to emphasize the mass ordering at low p__T.
The elliptic flow, v_2 (p_T), in 0–80% central Au+Au collisions for selected particles re plotted only for the transverse momentum range of 0.2< pT<1.6 GeV/c to emphasize the mass ordering at low p__T.
The elliptic flow, v_2 (p_T), in 0–80% central Au+Au collisions for selected particles re plotted only for the transverse momentum range of 0.2< pT<1.6 GeV/c to emphasize the mass ordering at low p__T.
The elliptic flow, v_2 (p_T), in 0–80% central Au+Au collisions for selected particles re plotted only for the transverse momentum range of 0.2< pT<1.6 GeV/c to emphasize the mass ordering at low p__T.
The elliptic flow, v_2 (p_T), in 0–80% central Au+Au collisions for selected particles re plotted only for the transverse momentum range of 0.2< pT<1.6 GeV/c to emphasize the mass ordering at low p__T.
The elliptic flow, v_2 (p_T), in 0–80% central Au+Au collisions for selected particles re plotted only for the transverse momentum range of 0.2< pT<1.6 GeV/c to emphasize the mass ordering at low p__T.
The elliptic flow, v_2 (p_T), in 0–80% central Au+Au collisions for selected particles re plotted only for the transverse momentum range of 0.2< pT<1.6 GeV/c to emphasize the mass ordering at low p__T.
The elliptic flow, v_2 (p_T), in 0–80% central Au+Au collisions for selected particles re plotted only for the transverse momentum range of 0.2< pT<1.6 GeV/c to emphasize the mass ordering at low p__T.
The elliptic flow, v_2 (p_T), in 0–80% central Au+Au collisions for selected particles re plotted only for the transverse momentum range of 0.2< pT<1.6 GeV/c to emphasize the mass ordering at low p__T.
The elliptic flow, v_2 (p_T), in 0–80% central Au+Au collisions for selected particles re plotted only for the transverse momentum range of 0.2< pT<1.6 GeV/c to emphasize the mass ordering at low p__T.
The elliptic flow, v_2 (p_T), in 0–80% central Au+Au collisions for selected particles re plotted only for the transverse momentum range of 0.2< pT<1.6 GeV/c to emphasize the mass ordering at low p__T.
The elliptic flow, v_2 (p_T), in 0–80% central Au+Au collisions for selected particles re plotted only for the transverse momentum range of 0.2< pT<1.6 GeV/c to emphasize the mass ordering at low p__T.
The elliptic flow, v_2 (p_T), in 0–80% central Au+Au collisions for selected particles re plotted only for the transverse momentum range of 0.2< pT<1.6 GeV/c to emphasize the mass ordering at low p__T.
The elliptic flow, v_2 (p_T), in 0–80% central Au+Au collisions for selected particles re plotted only for the transverse momentum range of 0.2< pT<1.6 GeV/c to emphasize the mass ordering at low p__T.
The elliptic flow, v_2 (p_T), in 0–80% central Au+Au collisions for selected particles re plotted only for the transverse momentum range of 0.2< pT<1.6 GeV/c to emphasize the mass ordering at low p__T.
The elliptic flow, v_2 (p_T), in 0–80% central Au+Au collisions for selected particles re plotted only for the transverse momentum range of 0.2< pT<1.6 GeV/c to emphasize the mass ordering at low p__T.
The elliptic flow, v_2 (p_T), in 0–80% central Au+Au collisions for selected particles re plotted only for the transverse momentum range of 0.2< pT<1.6 GeV/c to emphasize the mass ordering at low p__T.
The elliptic flow, v_2 (p_T), in 0–80% central Au+Au collisions for selected particles re plotted only for the transverse momentum range of 0.2< pT<1.6 GeV/c to emphasize the mass ordering at low p__T.
The elliptic flow, v_2 (p_T), in 0–80% central Au+Au collisions for selected particles re plotted only for the transverse momentum range of 0.2< pT<1.6 GeV/c to emphasize the mass ordering at low p__T.
The elliptic flow, v_2 (p_T), in 0–80% central Au+Au collisions for selected particles re plotted only for the transverse momentum range of 0.2< pT<1.6 GeV/c to emphasize the mass ordering at low p__T.
The elliptic flow, v_2 (p_T), in 0–80% central Au+Au collisions for selected particles re plotted only for the transverse momentum range of 0.2< pT<1.6 GeV/c to emphasize the mass ordering at low p__T.
The elliptic flow, v_2 (p_T), in 0–80% central Au+Au collisions for selected particles re plotted only for the transverse momentum range of 0.2< pT<1.6 GeV/c to emphasize the mass ordering at low p__T.
The elliptic flow, v_2 (p_T), in 0–80% central Au+Au collisions for selected particles re plotted only for the transverse momentum range of 0.2< pT<1.6 GeV/c to emphasize the mass ordering at low p__T.
The elliptic flow, v_2 (p_T), in 0–80% central Au+Au collisions for selected particles re plotted only for the transverse momentum range of 0.2< pT<1.6 GeV/c to emphasize the mass ordering at low p__T.
The elliptic flow, v_2 (p_T), in 0–80% central Au+Au collisions for selected particles re plotted only for the transverse momentum range of 0.2< pT<1.6 GeV/c to emphasize the mass ordering at low p__T.
The elliptic flow, v_2 (p_T), in 0–80% central Au+Au collisions for selected particles re plotted only for the transverse momentum range of 0.2< pT<1.6 GeV/c to emphasize the mass ordering at low p__T.
The elliptic flow, v_2 (p_T), in 0–80% central Au+Au collisions for selected particles re plotted only for the transverse momentum range of 0.2< pT<1.6 GeV/c to emphasize the mass ordering at low p__T.
The elliptic flow, v_2 (p_T), in 0–80% central Au+Au collisions for selected particles re plotted only for the transverse momentum range of 0.2< pT<1.6 GeV/c to emphasize the mass ordering at low p__T.
The elliptic flow, v_2 (p_T), in 0–80% central Au+Au collisions for selected particles re plotted only for the transverse momentum range of 0.2< pT<1.6 GeV/c to emphasize the mass ordering at low p__T.
The elliptic flow, v_2 (p_T), in 0–80% central Au+Au collisions for selected particles re plotted only for the transverse momentum range of 0.2< pT<1.6 GeV/c to emphasize the mass ordering at low p__T.
The elliptic flow, v_2 (p_T), in 0–80% central Au+Au collisions for selected particles re plotted only for the transverse momentum range of 0.2< pT<1.6 GeV/c to emphasize the mass ordering at low p__T.
The elliptic flow, v_2 (p_T), in 0–80% central Au+Au collisions for selected particles re plotted only for the transverse momentum range of 0.2< pT<1.6 GeV/c to emphasize the mass ordering at low p__T.
The elliptic flow, v_2 (p_T), in 0–80% central Au+Au collisions for selected particles re plotted only for the transverse momentum range of 0.2< pT<1.6 GeV/c to emphasize the mass ordering at low p__T.
The elliptic flow, v_2 (p_T), in 0–80% central Au+Au collisions for selected particles re plotted only for the transverse momentum range of 0.2< pT<1.6 GeV/c to emphasize the mass ordering at low p__T.
The elliptic flow, v_2 (p_T), in 0–80% central Au+Au collisions for selected particles re plotted only for the transverse momentum range of 0.2< pT<1.6 GeV/c to emphasize the mass ordering at low p__T.
The elliptic flow, v_2 (p_T), in 0–80% central Au+Au collisions for selected particles re plotted only for the transverse momentum range of 0.2< pT<1.6 GeV/c to emphasize the mass ordering at low p__T.
The elliptic flow, v_2 (p_T), in 0–80% central Au+Au collisions for selected particles re plotted only for the transverse momentum range of 0.2< pT<1.6 GeV/c to emphasize the mass ordering at low p__T.
The elliptic flow, v_2 (p_T), in 0–80% central Au+Au collisions for selected particles re plotted only for the transverse momentum range of 0.2< pT<1.6 GeV/c to emphasize the mass ordering at low p__T.
The elliptic flow, v_2 (p_T), in 0–80% central Au+Au collisions for selected particles re plotted only for the transverse momentum range of 0.2< pT<1.6 GeV/c to emphasize the mass ordering at low p__T.
The elliptic flow, v_2 (p_T), in 0–80% central Au+Au collisions for selected particles re plotted only for the transverse momentum range of 0.2< pT<1.6 GeV/c to emphasize the mass ordering at low p__T.
The elliptic flow, v_2 (p_T), in 0–80% central Au+Au collisions for selected particles re plotted only for the transverse momentum range of 0.2< pT<1.6 GeV/c to emphasize the mass ordering at low p__T.
The elliptic flow, v_2 (p_T), in 0–80% central Au+Au collisions for selected particles re plotted only for the transverse momentum range of 0.2< pT<1.6 GeV/c to emphasize the mass ordering at low p__T.
The elliptic flow, v_2 (p_T), in 0–80% central Au+Au collisions for selected anti-particles are plotted only for the transverse momentum range of 0.2< p_T<1.6 GeV/c to emphasize the mass ordering at low p_T.
The elliptic flow, v_2 (p_T), in 0–80% central Au+Au collisions for selected anti-particles are plotted only for the transverse momentum range of 0.2< p_T<1.6 GeV/c to emphasize the mass ordering at low p_T.
The elliptic flow, v_2 (p_T), in 0–80% central Au+Au collisions for selected anti-particles are plotted only for the transverse momentum range of 0.2< p_T<1.6 GeV/c to emphasize the mass ordering at low p_T.
The elliptic flow, v_2 (p_T), in 0–80% central Au+Au collisions for selected anti-particles are plotted only for the transverse momentum range of 0.2< p_T<1.6 GeV/c to emphasize the mass ordering at low p_T.
The elliptic flow, v_2 (p_T), in 0–80% central Au+Au collisions for selected anti-particles are plotted only for the transverse momentum range of 0.2< p_T<1.6 GeV/c to emphasize the mass ordering at low p_T.
The elliptic flow, v_2 (p_T), in 0–80% central Au+Au collisions for selected anti-particles are plotted only for the transverse momentum range of 0.2< p_T<1.6 GeV/c to emphasize the mass ordering at low p_T.
The elliptic flow, v_2 (p_T), in 0–80% central Au+Au collisions for selected anti-particles are plotted only for the transverse momentum range of 0.2< p_T<1.6 GeV/c to emphasize the mass ordering at low p_T.
The elliptic flow, v_2 (p_T), in 0–80% central Au+Au collisions for selected anti-particles are plotted only for the transverse momentum range of 0.2< p_T<1.6 GeV/c to emphasize the mass ordering at low p_T.
The elliptic flow, v_2 (p_T), in 0–80% central Au+Au collisions for selected anti-particles are plotted only for the transverse momentum range of 0.2< p_T<1.6 GeV/c to emphasize the mass ordering at low p_T.
The elliptic flow, v_2 (p_T), in 0–80% central Au+Au collisions for selected anti-particles are plotted only for the transverse momentum range of 0.2< p_T<1.6 GeV/c to emphasize the mass ordering at low p_T.
The elliptic flow, v_2 (p_T), in 0–80% central Au+Au collisions for selected anti-particles are plotted only for the transverse momentum range of 0.2< p_T<1.6 GeV/c to emphasize the mass ordering at low p_T.
The elliptic flow, v_2 (p_T), in 0–80% central Au+Au collisions for selected anti-particles are plotted only for the transverse momentum range of 0.2< p_T<1.6 GeV/c to emphasize the mass ordering at low p_T.
The elliptic flow, v_2 (p_T), in 0–80% central Au+Au collisions for selected anti-particles are plotted only for the transverse momentum range of 0.2< p_T<1.6 GeV/c to emphasize the mass ordering at low p_T.
The elliptic flow, v_2 (p_T), in 0–80% central Au+Au collisions for selected anti-particles are plotted only for the transverse momentum range of 0.2< p_T<1.6 GeV/c to emphasize the mass ordering at low p_T.
The elliptic flow, v_2 (p_T), in 0–80% central Au+Au collisions for selected anti-particles are plotted only for the transverse momentum range of 0.2< p_T<1.6 GeV/c to emphasize the mass ordering at low p_T.
The elliptic flow, v_2 (p_T), in 0–80% central Au+Au collisions for selected anti-particles are plotted only for the transverse momentum range of 0.2< p_T<1.6 GeV/c to emphasize the mass ordering at low p_T.
The elliptic flow, v_2 (p_T), in 0–80% central Au+Au collisions for selected anti-particles are plotted only for the transverse momentum range of 0.2< p_T<1.6 GeV/c to emphasize the mass ordering at low p_T.
The elliptic flow, v_2 (p_T), in 0–80% central Au+Au collisions for selected anti-particles are plotted only for the transverse momentum range of 0.2< p_T<1.6 GeV/c to emphasize the mass ordering at low p_T.
The elliptic flow, v_2 (p_T), in 0–80% central Au+Au collisions for selected anti-particles are plotted only for the transverse momentum range of 0.2< p_T<1.6 GeV/c to emphasize the mass ordering at low p_T.
The elliptic flow, v_2 (p_T), in 0–80% central Au+Au collisions for selected anti-particles are plotted only for the transverse momentum range of 0.2< p_T<1.6 GeV/c to emphasize the mass ordering at low p_T.
The elliptic flow, v_2 (p_T), in 0–80% central Au+Au collisions for selected anti-particles are plotted only for the transverse momentum range of 0.2< p_T<1.6 GeV/c to emphasize the mass ordering at low p_T.
The elliptic flow, v_2 (p_T), in 0–80% central Au+Au collisions for selected anti-particles are plotted only for the transverse momentum range of 0.2< p_T<1.6 GeV/c to emphasize the mass ordering at low p_T.
The elliptic flow, v_2 (p_T), in 0–80% central Au+Au collisions for selected anti-particles are plotted only for the transverse momentum range of 0.2< p_T<1.6 GeV/c to emphasize the mass ordering at low p_T.
The elliptic flow, v_2 (p_T), in 0–80% central Au+Au collisions for selected anti-particles are plotted only for the transverse momentum range of 0.2< p_T<1.6 GeV/c to emphasize the mass ordering at low p_T.
The elliptic flow, v_2 (p_T), in 0–80% central Au+Au collisions for selected anti-particles are plotted only for the transverse momentum range of 0.2< p_T<1.6 GeV/c to emphasize the mass ordering at low p_T.
The elliptic flow, v_2 (p_T), in 0–80% central Au+Au collisions for selected anti-particles are plotted only for the transverse momentum range of 0.2< p_T<1.6 GeV/c to emphasize the mass ordering at low p_T.
The elliptic flow, v_2 (p_T), in 0–80% central Au+Au collisions for selected anti-particles are plotted only for the transverse momentum range of 0.2< p_T<1.6 GeV/c to emphasize the mass ordering at low p_T.
The elliptic flow, v_2 (p_T), in 0–80% central Au+Au collisions for selected anti-particles are plotted only for the transverse momentum range of 0.2< p_T<1.6 GeV/c to emphasize the mass ordering at low p_T.
The elliptic flow, v_2 (p_T), in 0–80% central Au+Au collisions for selected anti-particles are plotted only for the transverse momentum range of 0.2< p_T<1.6 GeV/c to emphasize the mass ordering at low p_T.
The elliptic flow, v_2 (p_T), in 0–80% central Au+Au collisions for selected anti-particles are plotted only for the transverse momentum range of 0.2< p_T<1.6 GeV/c to emphasize the mass ordering at low p_T.
The elliptic flow, v_2 (p_T), in 0–80% central Au+Au collisions for selected anti-particles are plotted only for the transverse momentum range of 0.2< p_T<1.6 GeV/c to emphasize the mass ordering at low p_T.
The elliptic flow, v_2 (p_T), in 0–80% central Au+Au collisions for selected anti-particles are plotted only for the transverse momentum range of 0.2< p_T<1.6 GeV/c to emphasize the mass ordering at low p_T.
The elliptic flow, v_2 (p_T), in 0–80% central Au+Au collisions for selected anti-particles are plotted only for the transverse momentum range of 0.2< p_T<1.6 GeV/c to emphasize the mass ordering at low p_T.
The elliptic flow, v_2 (p_T), in 0–80% central Au+Au collisions for selected anti-particles are plotted only for the transverse momentum range of 0.2< p_T<1.6 GeV/c to emphasize the mass ordering at low p_T.
The elliptic flow, v_2 (p_T), in 0–80% central Au+Au collisions for selected anti-particles are plotted only for the transverse momentum range of 0.2< p_T<1.6 GeV/c to emphasize the mass ordering at low p_T.
The elliptic flow, v_2 (p_T), in 0–80% central Au+Au collisions for selected anti-particles are plotted only for the transverse momentum range of 0.2< p_T<1.6 GeV/c to emphasize the mass ordering at low p_T.
The elliptic flow, v_2 (p_T), in 0–80% central Au+Au collisions for selected anti-particles are plotted only for the transverse momentum range of 0.2< p_T<1.6 GeV/c to emphasize the mass ordering at low p_T.
The elliptic flow, v_2 (p_T), in 0–80% central Au+Au collisions for selected anti-particles are plotted only for the transverse momentum range of 0.2< p_T<1.6 GeV/c to emphasize the mass ordering at low p_T.
The elliptic flow, v_2 (p_T), in 0–80% central Au+Au collisions for selected anti-particles are plotted only for the transverse momentum range of 0.2< p_T<1.6 GeV/c to emphasize the mass ordering at low p_T.
The elliptic flow, v_2 (p_T), in 0–80% central Au+Au collisions for selected anti-particles are plotted only for the transverse momentum range of 0.2< p_T<1.6 GeV/c to emphasize the mass ordering at low p_T.
The elliptic flow, v_2 (p_T), in 0–80% central Au+Au collisions for selected anti-particles are plotted only for the transverse momentum range of 0.2< p_T<1.6 GeV/c to emphasize the mass ordering at low p_T.
The elliptic flow, v_2 (p_T), in 0–80% central Au+Au collisions for selected anti-particles are plotted only for the transverse momentum range of 0.2< p_T<1.6 GeV/c to emphasize the mass ordering at low p_T.
The elliptic flow, v_2 (p_T), in 0–80% central Au+Au collisions for selected anti-particles are plotted only for the transverse momentum range of 0.2< p_T<1.6 GeV/c to emphasize the mass ordering at low p_T.
The elliptic flow, v_2 (p_T), in 0–80% central Au+Au collisions for selected anti-particles are plotted only for the transverse momentum range of 0.2< p_T<1.6 GeV/c to emphasize the mass ordering at low p_T.
The elliptic flow, v_2 (p_T), in 0–80% central Au+Au collisions for selected anti-particles are plotted only for the transverse momentum range of 0.2< p_T<1.6 GeV/c to emphasize the mass ordering at low p_T.
The elliptic flow, v_2, of charged pions as a function of the transverse momentum,p_T,for 0–80% central Au+Au collisions.
The elliptic flow, v_2, of charged pions as a function of the transverse momentum,p_T,for 0–80% central Au+Au collisions. Different ∆v_2 ranges were used for the upper and lower panels.
The elliptic flow, v_2, of charged pions as a function of the transverse momentum,p_T,for 0–80% central Au+Au collisions.
The elliptic flow, v_2, of charged pions as a function of the transverse momentum,p_T,for 0–80% central Au+Au collisions Different ∆v_2 ranges were used for the upper and lower panels.
The elliptic flow, v_2, of charged pions as a function of the transverse momentum,p_T,for 0–80% central Au+Au collisions
The elliptic flow, v_2, of charged pions as a function of the transverse momentum,p_T,for 0–80% central Au+Au collisions. Different ∆v_2 ranges were used for the upper and lower panels.
The elliptic flow, v_2, of charged pions as a function of the transverse momentum,p_T,for 0–80% central Au+Au collisions.
The elliptic flow, v_2, of charged pions as a function of the transverse momentum,p_T,for 0–80% central Au+Au collisions. Different ∆v_2 ranges were used for the upper and lower panels.
The elliptic flow, v_2, of charged pions as a function of the transverse momentum,p_T,for 0–80% central Au+Au collisions.
The elliptic flow, v_2, of charged pions as a function of the transverse momentum,p_T,for 0–80% central Au+Au collisions. Different ∆v_2 ranges were used for the upper and lower panels.
The elliptic flow, v_2, of charged pions as a function of the transverse momentum,p_T,for 0–80% central Au+Au collisions.
The elliptic flow, v_2, of charged pions as a function of the transverse momentum,p_T,for 0–80% central Au+Au collisions. Different ∆v_2 ranges were used for the upper and lower panels.
The elliptic flow, v_2, of charged kaons as a function of the transverse momentum,p_T,for 0–80% central Au+Au collisions.
The elliptic flow, v_2, of charged kaons as a function of the transverse momentum,p_T,for 0–80% central Au+Au collisions.
The elliptic flow, v_2, of charged kaons as a function of the transverse momentum,p_T,for 0–80% central Au+Au collisions. Different ∆v_2 ranges were used for the upper and lower panels.
The elliptic flow, v_2, of charged kaons as a function of the transverse momentum,p_T,for 0–80% central Au+Au collisions.
The elliptic flow, v_2, of charged kaons as a function of the transverse momentum,p_T,for 0–80% central Au+Au collisions.
The elliptic flow, v_2, of charged kaons as a function of the transverse momentum,p_T,for 0–80% central Au+Au collisions. Different ∆v_2 ranges were used for the upper and lower panels.
The elliptic flow, v_2, of charged kaons as a function of the transverse momentum,p_T,for 0–80% central Au+Au collisions.
The elliptic flow, v_2, of charged kaons as a function of the transverse momentum,p_T,for 0–80% central Au+Au collisions.
The elliptic flow, v_2, of charged koans as a function of the transverse momentum,p_T,for 0–80% central Au+Au collisions. Different ∆v_2 ranges were used for the upper and lower panels.
The elliptic flow, v_2, of charged kaons as a function of the transverse momentum,p_T,for 0–80% central Au+Au collisions.
The elliptic flow, v_2, of charged kaons as a function of the transverse momentum,p_T,for 0–80% central Au+Au collisions.
The elliptic flow, v_2, of charged koans as a function of the transverse momentum,p_T,for 0–80% central Au+Au collisions. Different ∆v_2 ranges were used for the upper and lower panels.
The elliptic flow, v_2, of charged koans as a function of the transverse momentum,p_T,for 0–80% central Au+Au collisions.
The elliptic flow, v_2, of charged koans as a function of the transverse momentum,p_T,for 0–80% central Au+Au collisions.
The elliptic flow, v_2, of charged koans as a function of the transverse momentum,p_T,for 0–80% central Au+Au collisions. Different ∆v_2 ranges were used for the upper and lower panels.
The elliptic flow, v_2, of charged koans as a function of the transverse momentum,p_T,for 0–80% central Au+Au collisions.
The elliptic flow, v_2, of charged koans as a function of the transverse momentum,p_T,for 0–80% central Au+Au collisions.
The elliptic flow, v_2, of charged koans as a function of the transverse momentum,p_T,for 0–80% central Au+Au collisions. Different ∆v_2 ranges were used for the upper and lower panels.
The elliptic flow,v_2 of p, $\overline{p}$ as a function of the transverse momentum, p_T,for 0–80% central Au+Au collisions.
The elliptic flow,v_2 of p, $\overline{p}$ as a function of the transverse momentum, p_T,for 0–80% central Au+Au collisions.
The elliptic flow,v_2 of p, $\overline{p}$ as a function of the transverse momentum, p_T,for 0–80% central Au+Au collisions
The elliptic flow,v_2 of p, $\overline{p}$ as a function of the transverse momentum, p_T,for 0–80% central Au+Au collisions.
The elliptic flow,v_2 of p, $\overline{p}$ as a function of the transverse momentum, p_T,for 0–80% central Au+Au collisions.
The elliptic flow,v_2 of p, $\overline{p}$ as a function of the transverse momentum, p_T,for 0–80% central Au+Au collisions.
The elliptic flow,v_2 of p, $\overline{p}$ as a function of the transverse momentum, p_T,for 0–80% central Au+Au collisions.
The elliptic flow,v_2 of p, $\overline{p}$ as a function of the transverse momentum, p_T,for 0–80% central Au+Au collisions.
The elliptic flow,v_2 of p, $\overline{p}$ as a function of the transverse momentum, p_T,for 0–80% central Au+Au collisions.
The elliptic flow,v_2 of p, $\overline{p}$ as a function of the transverse momentum, p_T,for 0–80% central Au+Au collisions.
The elliptic flow,v_2 of p, $\overline{p}$ as a function of the transverse momentum, p_T,for 0–80% central Au+Au collisions.
The elliptic flow,v_2 of p, $\overline{p}$ as a function of the transverse momentum, p_T,for 0–80% central Au+Au collisions.
The elliptic flow,v_2 of $\Lambda$ and $\overline{\Lambda}$ as a function of the transverse momentum, p_T,for 0–80% central Au+Au. collisions.
The elliptic flow,v_2 of $\Lambda$ and $\overline{\Lambda}$ as a function of the transverse momentum, p_T,for 0–80% central Au+Au. collisions.
The elliptic flow,v_2 of $\Lambda$ and $\overline{\Lambda}$ as a function of the transverse momentum, p_T,for 0–80% central Au+Au. collisions.
The elliptic flow,v_2 of $\Lambda$ and $\overline{\Lambda}$ as a function of the transverse momentum, p_T,for 0–80% central Au+Au. collisions.
The elliptic flow,v_2 of $\Lambda$ and $\overline{\Lambda}$ as a function of the transverse momentum, p_T,for 0–80% central Au+Au. collisions.
The elliptic flow,v_2 of $\Lambda$ and $\overline{\Lambda}$ as a function of the transverse momentum, p_T,for 0–80% central Au+Au. collisions.
The elliptic flow,v_2 of $\Lambda$ and $\overline{\Lambda}$ as a function of the transverse momentum, p_T,for 0–80% central Au+Au. collisions.
The elliptic flow,v_2 of $\Lambda$ and $\overline{\Lambda}$ as a function of the transverse momentum, p_T,for 0–80% central Au+Au. collisions.
The elliptic flow,v_2 of $\Lambda$ and $\overline{\Lambda}$ as a function of the transverse momentum, p_T,for 0–80% central Au+Au. collisions.
The elliptic flow,v_2 of $\Lambda$ and $\overline{\Lambda}$ as a function of the transverse momentum, p_T,for 0–80% central Au+Au. collisions.
The elliptic flow,v_2 of $\Lambda$ and $\overline{\Lambda}$ as a function of the transverse momentum, p_T,for 0–80% central Au+Au collisions.
The elliptic flow,v_2 of $\Lambda$ and $\overline{\Lambda}$ as a function of the transverse momentum, p_T,for 0–80% central Au+Au collisions.
The elliptic flow,v_2 of $\Xi^{-}$ and $\overline{\Xi^{+}}$ as a function of the transverse momentum, p_T,for 0–80% central Au+Au collisions.
The elliptic flow,v_2 of $\Xi^{-}$ and $\overline{\Xi^{+}}$ as a function of the transverse momentum, p_T,for 0–80% central Au+Au collisions.
The elliptic flow,v_2 of $\Xi^{-}$ and $\overline{\Xi^{+}}$ as a function of the transverse momentum, p_T,for 0–80% central Au+Au.
The elliptic flow,v_2 of $\Xi^{-}$ and $\overline{\Xi^{+}}$ as a function of the transverse momentum, p_T,for 0–80% central Au+Au collisions.
The elliptic flow,v_2 of $\Xi^{-}$ and $\overline{\Xi^{+}}$ as a function of the transverse momentum, p_T,for 0–80% central Au+Au collisions.
The elliptic flow,v_2 of $\Xi^{-}$ and $\overline{\Xi^{+}}$ as a function of the transverse momentum, p_T,for 0–80% central Au+Au collisions.
The elliptic flow,v_2 of $\Xi^{-}$ and $\overline{\Xi^{+}}$ as a function of the transverse momentum, p_T,for 0–80% central Au+Au collisions.
The elliptic flow,v_2 of $\Xi^{-}$ and $\overline{\Xi^{+}}$ as a function of the transverse momentum, p_T,for 0–80% central Au+Au collisions.
The elliptic flow,v_2 of $\Xi^{-}$ and $\overline{\Xi^{+}}$ as a function of the transverse momentum, p_T,for 0–80% central Au+Au collisions.
The elliptic flow,v_2 of $\Xi^{-}$ and $\overline{\Xi^{+}}$ as a function of the transverse momentum, p_T,for 0–80% central Au+Au collisions.
The elliptic flow,v_2 of $\Xi^{-}$ and $\overline{\Xi^{+}}$ as a function of the transverse momentum, p_T,for 0–80% central Au+Au collisions.
The elliptic flow,v_2 of $\Xi^{-}$ and $\overline{\Xi^{+}}$ as a function of the transverse momentum, p_T,for 0–80% central Au+Au collisions.
The elliptic flow,v_2 of $Omega^{-}$ and $\overline{\Omega^{+}}$ as a function of the transverse momentum, p_T,for 0–80% central Au+Au collisions.
The elliptic flow,v_2 of $Omega^{-}$ and $\overline{\Omega^{+}}$ as a function of the transverse momentum, p_T,for 0–80% central Au+Au collisions.
The elliptic flow,v_2 of $Omega^{-}$ and $\overline{\Omega^{+}}$ as a function of the transverse momentum, p_T,for 0–80% central Au+Au collisions.
The elliptic flow,v_2 of $Omega^{-}$ and $\overline{\Omega^{+}}$ as a function of the transverse momentum, p_T,for 0–80% central Au+Au collisions.
The elliptic flow,v_2 of $Omega^{-}$ and $\overline{\Omega^{+}}$ as a function of the transverse momentum, p_T,for 0–80% central Au+Au collisions.
The elliptic flow,v_2 of $Omega^{-}$ and $\overline{\Omega^{+}}$ as a function of the transverse momentum, p_T,for 0–80% central Au+Au collisions.
The elliptic flow,v_2 of $Omega^{-}$ and $\overline{\Omega^{+}}$ as a function of the transverse momentum, p_T,for 0–80% central Au+Au collisions.
The elliptic flow,v_2 of $Omega^{-}$ and $\overline{\Omega^{+}}$ as a function of the transverse momentum, p_T,for 0–80% central Au+Au collisions.
The elliptic flow,v_2 of $Omega^{-}$ and $\overline{\Omega^{+}}$ as a function of the transverse momentum, p_T,for 0–80% central Au+Au collisions.
The elliptic flow,v_2 of $Omega^{-}$ and $\overline{\Omega^{+}}$ as a function of the transverse momentum, p_T,for 0–80% central Au+Au collisions.
The elliptic flow,v_2 of Λ,Λbar as a function of the transverse momentum, p_T,for 0–80% central Au+Au collisions
The elliptic flow,v_2, of $\phi$ mesons as a function of the transverse momentum, p_T, for 0–80% central Au+Au collisions.
The elliptic flow,v_2, of $\phi$ mesons as a function of the transverse momentum, p_T, for 0–80% central Au+Au collisions.
The elliptic flow,v_2, of $\phi$ mesons as a function of the transverse momentum, p_T, for 0–80% central Au+Au collisions.
The elliptic flow,v_2, of $\phi$ mesons as a function of the transverse momentum, p_T, for 0–80% central Au+Au collisions.
The elliptic flow,v_2, of $\phi$ mesons as a function of the transverse momentum, p_T, for 0–80% central Au+Au collisions.
The elliptic flow,v_2, of $\phi$ mesons as a function of the transverse momentum, p_T, for 0–80% central Au+Au collisions.
The elliptic flow, v_2, of p and $\overline{p}$ as a function of the transverse momentum, p_T, for 0–10% central Au+Au collisions.
The elliptic flow, v_2, of p and $\overline{p}$ as a function of the transverse momentum, p_T, for 0–10% central Au+Au collisions.
The elliptic flow, v_2, of p and $\overline{p}$ as a function of the transverse momentum, p_T, for 0–10% central Au+Au collisions.
The elliptic flow, v_2, of p and $\overline{p}$ as a function of the transverse momentum, p_T, for 0–10% central Au+Au collisions.
The elliptic flow, v_2, of p and $\overline{p}$ as a function of the transverse momentum, p_T, for 0–10% central Au+Au collisions.
The elliptic flow, v_2, of p and $\overline{p}$ as a function of the transverse momentum, p_T, for 0–10% central Au+Au collisions.
The elliptic flow, v_2, of p and $\overline{p}$ as a function of the transverse momentum, p_T, for 0–10% central Au+Au collisions.
The elliptic flow, v_2, of p and $\overline{p}$ as a function of the transverse momentum, p_T, for 0–10% central Au+Au collisions.
The elliptic flow, v_2, of p and $\overline{p}$ as a function of the transverse momentum, p_T, for 0–10% central Au+Au collisions.
The elliptic flow, v_2, of p and $\overline{p}$ as a function of the transverse momentum, p_T, for 0–10% central Au+Au collisions.
The elliptic flow, v_2, of p and $\overline{p}$ as a function of the transverse momentum, p_T, for 0–10% central Au+Au collisions.
The elliptic flow, v_2, of p and $\overline{p}$ as a function of the transverse momentum, p_T, for 0–10% central Au+Au collisions.
The elliptic flow, v_2, of p and $\overline{p}$ as a function of the transverse momentum, p_T, for 10–40% central Au+Au collisions.
The elliptic flow, v_2, of p and $\overline{p}$ as a function of the transverse momentum, p_T, for 10–40% central Au+Au collisions.
The elliptic flow, v_2, of p and $\overline{p}$ as a function of the transverse momentum, p_T, for 10–40% central Au+Au collisions.
The elliptic flow, v_2, of p and $\overline{p}$ as a function of the transverse momentum, p_T, for 10–40% central Au+Au collisions.
The elliptic flow, v_2, of p and $\overline{p}$ as a function of the transverse momentum, p_T, for 10–40% central Au+Au collisions.
The elliptic flow, v_2, of p and $\overline{p}$ as a function of the transverse momentum, p_T, for 10–40% central Au+Au collisions.
The elliptic flow, v_2, of p and $\overline{p}$ as a function of the transverse momentum, p_T, for 10–40% central Au+Au collisions.
The elliptic flow, v_2, of p and $\overline{p}$ as a function of the transverse momentum, p_T, for 10–40% central Au+Au collisions.
The elliptic flow,v_2 of Λ,Λbar as a function of the transverse momentum, p_T,for 0–80% central Au+Au collisions
The elliptic flow, v_2, of p and $\overline{p}$ as a function of the transverse momentum, p_T, for 10–40% central Au+Au collisions.
The elliptic flow, v_2, of p and $\overline{p}$ as a function of the transverse momentum, p_T, for 10–40% central Au+Au collisions.
The elliptic flow, v_2, of p and $\overline{p}$ as a function of the transverse momentum, p_T, for 10–40% central Au+Au collisions.
The elliptic flow, v_2, of p and $\overline{p}$ as a function of the transverse momentum, p_T, for 40–80% central Au+Au collisions.
The elliptic flow, v_2, of p and $\overline{p}$ as a function of the transverse momentum, p_T, for 40–80% central Au+Au collisions.
The elliptic flow, v_2, of p and $\overline{p}$ as a function of the transverse momentum, p_T, for 40–80% central Au+Au collisions.
The elliptic flow, v_2, of p and $\overline{p}$ as a function of the transverse momentum, p_T, for 40–80% central Au+Au collisions.
The elliptic flow, v_2, of p and $\overline{p}$ as a function of the transverse momentum, p_T, for 40–80% central Au+Au collisions.
The elliptic flow, v_2, of p and $\overline{p}$ as a function of the transverse momentum, p_T, for 40–80% central Au+Au collisions.
The elliptic flow, v_2, of p and $\overline{p}$ as a function of the transverse momentum, p_T, for 40–80% central Au+Au collisions.
The elliptic flow, v_2, of p and $\overline{p}$ as a function of the transverse momentum, p_T, for 40–80% central Au+Au collisions.
The elliptic flow, v_2, of p and $\overline{p}$ as a function of the transverse momentum, p_T, for 40–80% central Au+Au collisions.
The elliptic flow, v_2, of p and $\overline{p}$ as a function of the transverse momentum, p_T, for 40–80% central Au+Au collisions.
The elliptic flow, v_2, of p and $\overline{p}$ as a function of the transverse momentum, p_T, for 40–80% central Au+Au collisions.
The elliptic flow, v_2, of p and $\overline{p}$ as a function of the transverse momentum, p_T, for 40–80% central Au+Au collisions.
The elliptic flow,v_2, of 0–80% central Au+Au collisions as a function of the reduced transverse mass,$ m_T−m_0 $, for selected particles.
The elliptic flow,v_2, of 0–80% central Au+Au collisions as a function of the reduced transverse mass,$ m_T−m_0 $, for selected particles.
The elliptic flow,v_2, of 0–80% central Au+Au collisions as a function of the reduced transverse mass,$ m_T−m_0 $, for selected particles.
The elliptic flow,v_2, of 0–80% central Au+Au collisions as a function of the reduced transverse mass,$ m_T−m_0 $, for selected particles.
The elliptic flow,v_2, of 0–80% central Au+Au collisions as a function of the reduced transverse mass,$ m_T−m_0 $, for selected particles.
The elliptic flow,v_2, of 0–80% central Au+Au collisions as a function of the reduced transverse mass,$ m_T−m_0 $, for selected particles.
The elliptic flow,v_2, of 0–80% central Au+Au collisions as a function of the reduced transverse mass,$ m_T−m_0 $, for selected particles.
The elliptic flow,v_2, of 0–80% central Au+Au collisions as a function of the reduced transverse mass,$ m_T−m_0 $, for selected particles.
The elliptic flow,v_2, of 0–80% central Au+Au collisions as a function of the reduced transverse mass,$ m_T−m_0 $, for selected particles.
The elliptic flow,v_2, of 0–80% central Au+Au collisions as a function of the reduced transverse mass,$ m_T−m_0 $, for selected particles.
The elliptic flow,v_2, of 0–80% central Au+Au collisions as a function of the reduced transverse mass,$ m_T−m_0 $, for selected particles.
The elliptic flow,v_2, of 0–80% central Au+Au collisions as a function of the reduced transverse mass,$ m_T−m_0 $, for selected particles.
The elliptic flow,v_2, of 0–80% central Au+Au collisions as a function of the reduced transverse mass,$ m_T−m_0 $, for selected particles.
The elliptic flow,v_2, of 0–80% central Au+Au collisions as a function of the reduced transverse mass,$ m_T−m_0 $, for selected particles.
The elliptic flow,v_2, of 0–80% central Au+Au collisions as a function of the reduced transverse mass,$ m_T−m_0 $, for selected particles.
The elliptic flow,v_2, of 0–80% central Au+Au collisions as a function of the reduced transverse mass,$ m_T−m_0 $, for selected particles.
The elliptic flow,v_2, of 0–80% central Au+Au collisions as a function of the reduced transverse mass,$ m_T−m_0 $, for selected particles.
The elliptic flow,v_2, of 0–80% central Au+Au collisions as a function of the reduced transverse mass,$ m_T−m_0 $, for selected particles.
The elliptic flow,v_2, of 0–80% central Au+Au collisions as a function of the reduced transverse mass,$ m_T−m_0 $, for selected particles.
The elliptic flow,v_2, of 0–80% central Au+Au collisions as a function of the reduced transverse mass,$ m_T−m_0 $, for selected particles.
The elliptic flow,v_2, of 0–80% central Au+Au collisions as a function of the reduced transverse mass,$ m_T−m_0 $, for selected particles.
The elliptic flow,v_2, of 0–80% central Au+Au collisions as a function of the reduced transverse mass,$ m_T−m_0 $, for selected particles.
The elliptic flow,v_2, of 0–80% central Au+Au collisions as a function of the reduced transverse mass,$ m_T−m_0 $, for selected particles.
The elliptic flow,v_2, of 0–80% central Au+Au collisions as a function of the reduced transverse mass,$ m_T−m_0 $, for selected particles.
The elliptic flow,v_2, of 0–80% central Au+Au collisions as a function of the reduced transverse mass,$ m_T−m_0 $, for selected particles.
The elliptic flow,v_2, of 0–80% central Au+Au collisions as a function of the reduced transverse mass,$ m_T−m_0 $, for selected particles.
The elliptic flow,v_2, of 0–80% central Au+Au collisions as a function of the reduced transverse mass,$ m_T−m_0 $, for selected particles.
The elliptic flow,v_2, of 0–80% central Au+Au collisions as a function of the reduced transverse mass,$ m_T−m_0 $, for selected particles.
The elliptic flow,v_2, of 0–80% central Au+Au collisions as a function of the reduced transverse mass,$ m_T−m_0 $, for selected particles.
The elliptic flow,v_2, of 0–80% central Au+Au collisions as a function of the reduced transverse mass,$ m_T−m_0 $, for selected particles.
The elliptic flow,v_2, of 0–80% central Au+Au collisions as a function of the reduced transverse mass,$ m_T−m_0 $, for selected particles.
The elliptic flow,v_2, of 0–80% central Au+Au collisions as a function of the reduced transverse mass,$ m_T−m_0 $, for selected particles.
The elliptic flow,v_2, of 0–80% central Au+Au collisions as a function of the reduced transverse mass,$ m_T−m_0 $, for selected particles.
The elliptic flow,v_2, of 0–80% central Au+Au collisions as a function of the reduced transverse mass,$ m_T−m_0 $, for selected particles.
The elliptic flow,v_2, of 0–80% central Au+Au collisions as a function of the reduced transverse mass,$ m_T−m_0 $, for selected particles.
The elliptic flow,v_2, of 0–80% central Au+Au collisions as a function of the reduced transverse mass,$ m_T−m_0 $, for selected particles.
The elliptic flow,v_2, of 0–80% central Au+Au collisions as a function of the reduced transverse mass,$ m_T−m_0 $, for selected particles.
The elliptic flow,v_2, of 0–80% central Au+Au collisions as a function of the reduced transverse mass,$ m_T−m_0 $, for selected particles.
The elliptic flow,v_2, of 0–80% central Au+Au collisions as a function of the reduced transverse mass,$ m_T−m_0 $, for selected particles.
The elliptic flow,v_2, of 0–80% central Au+Au collisions as a function of the reduced transverse mass,$ m_T−m_0 $, for selected particles.
The elliptic flow,v_2, of 0–80% central Au+Au collisions as a function of the reduced transverse mass,$ m_T−m_0 $, for selected particles.
The elliptic flow,v_2, of 0–80% central Au+Au collisions as a function of the reduced transverse mass,$ m_T−m_0 $, for selected particles.
The elliptic flow,v_2, of 0–80% central Au+Au collisions as a function of the reduced transverse mass,$ m_T−m_0 $, for selected anti-particles.
The elliptic flow,v_2, of 0–80% central Au+Au collisions as a function of the reduced transverse mass,$ m_T−m_0 $, for selected anti-particles.
The elliptic flow,v_2, of 0–80% central Au+Au collisions as a function of the reduced transverse mass,$ m_T−m_0 $, for selected anti-particles.
The elliptic flow,v_2, of 0–80% central Au+Au collisions as a function of the reduced transverse mass,$ m_T−m_0 $, for selected anti-particles.
The elliptic flow,v_2, of 0–80% central Au+Au collisions as a function of the reduced transverse mass,$ m_T−m_0 $, for selected anti-particles.
The elliptic flow,v_2, of 0–80% central Au+Au collisions as a function of the reduced transverse mass,$ m_T−m_0 $, for selected anti-particles.
The elliptic flow,v_2, of 0–80% central Au+Au collisions as a function of the reduced transverse mass,$ m_T−m_0 $, for selected anti-particles.
The elliptic flow,v_2, of 0–80% central Au+Au collisions as a function of the reduced transverse mass,$ m_T−m_0 $, for selected anti-particles.
The elliptic flow,v_2, of 0–80% central Au+Au collisions as a function of the reduced transverse mass,$ m_T−m_0 $, for selected anti-particles.
The elliptic flow,v_2, of 0–80% central Au+Au collisions as a function of the reduced transverse mass,$ m_T−m_0 $, for selected anti-particles.
The elliptic flow,v_2, of 0–80% central Au+Au collisions as a function of the reduced transverse mass,$ m_T−m_0 $, for selected anti-particles.
The elliptic flow,v_2, of 0–80% central Au+Au collisions as a function of the reduced transverse mass,$ m_T−m_0 $, for selected anti-particles.
The elliptic flow,v_2, of 0–80% central Au+Au collisions as a function of the reduced transverse mass,$ m_T−m_0 $, for selected anti-particles.
The elliptic flow,v_2, of 0–80% central Au+Au collisions as a function of the reduced transverse mass,$ m_T−m_0 $, for selected anti-particles.
The elliptic flow,v_2, of 0–80% central Au+Au collisions as a function of the reduced transverse mass,$ m_T−m_0 $, for selected anti-particles.
The elliptic flow,v_2, of 0–80% central Au+Au collisions as a function of the reduced transverse mass,$ m_T−m_0 $, for selected anti-particles.
The elliptic flow,v_2, of 0–80% central Au+Au collisions as a function of the reduced transverse mass,$ m_T−m_0 $, for selected anti-particles.
The elliptic flow,v_2, of 0–80% central Au+Au collisions as a function of the reduced transverse mass,$ m_T−m_0 $, for selected anti-particles.
The elliptic flow,v_2, of 0–80% central Au+Au collisions as a function of the reduced transverse mass,$ m_T−m_0 $, for selected anti-particles.
The elliptic flow,v_2, of 0–80% central Au+Au collisions as a function of the reduced transverse mass,$ m_T−m_0 $, for selected anti-particles.
The elliptic flow,v_2, of 0–80% central Au+Au collisions as a function of the reduced transverse mass,$ m_T−m_0 $, for selected anti-particles.
The elliptic flow,v_2, of 0–80% central Au+Au collisions as a function of the reduced transverse mass,$ m_T−m_0 $, for selected anti-particles.
The elliptic flow,v_2, of 0–80% central Au+Au collisions as a function of the reduced transverse mass,$ m_T−m_0 $, for selected anti-particles.
The elliptic flow,v_2, of 0–80% central Au+Au collisions as a function of the reduced transverse mass,$ m_T−m_0 $, for selected anti-particles.
The elliptic flow,v_2, of 0–80% central Au+Au collisions as a function of the reduced transverse mass,$ m_T−m_0 $, for selected anti-particles.
The elliptic flow,v_2, of 0–80% central Au+Au collisions as a function of the reduced transverse mass,$ m_T−m_0 $, for selected anti-particles.
The elliptic flow,v_2, of 0–80% central Au+Au collisions as a function of the reduced transverse mass,$ m_T−m_0 $, for selected anti-particles.
The elliptic flow,v_2, of 0–80% central Au+Au collisions as a function of the reduced transverse mass,$ m_T−m_0 $, for selected anti-particles.
The elliptic flow,v_2, of 0–80% central Au+Au collisions as a function of the reduced transverse mass,$ m_T−m_0 $, for selected anti-particles.
The elliptic flow,v_2, of 0–80% central Au+Au collisions as a function of the reduced transverse mass,$ m_T−m_0 $, for selected anti-particles.
The elliptic flow,v_2, of 0–80% central Au+Au collisions as a function of the reduced transverse mass,$ m_T−m_0 $, for selected anti-particles.
The elliptic flow,v_2, of 0–80% central Au+Au collisions as a function of the reduced transverse mass,$ m_T−m_0 $, for selected anti-particles.
The elliptic flow,v_2, of 0–80% central Au+Au collisions as a function of the reduced transverse mass,$ m_T−m_0 $, for selected anti-particles.
The elliptic flow,v_2, of 0–80% central Au+Au collisions as a function of the reduced transverse mass,$ m_T−m_0 $, for selected anti-particles.
The elliptic flow,v_2, of 0–80% central Au+Au collisions as a function of the reduced transverse mass,$ m_T−m_0 $, for selected anti-particles.
The elliptic flow,v_2, of 0–80% central Au+Au collisions as a function of the reduced transverse mass,$ m_T−m_0 $, for selected anti-particles.
The elliptic flow,v_2, of 0–80% central Au+Au collisions as a function of the reduced transverse mass,$ m_T−m_0 $, for selected anti-particles.
The elliptic flow,v_2, of 0–80% central Au+Au collisions as a function of the reduced transverse mass,$ m_T−m_0 $, for selected anti-particles.
The elliptic flow,v_2, of 0–80% central Au+Au collisions as a function of the reduced transverse mass,$ m_T−m_0 $, for selected anti-particles.
The elliptic flow,v_2, of 0–80% central Au+Au collisions as a function of the reduced transverse mass,$ m_T−m_0 $, for selected anti-particles.
The elliptic flow,v_2, of 0–80% central Au+Au collisions as a function of the reduced transverse mass,$ m_T−m_0 $, for selected anti-particles.
The elliptic flow,v_2, of 0–80% central Au+Au collisions as a function of the reduced transverse mass,$ m_T−m_0 $, for selected anti-particles.
The difference in the v_2 values between a particle X and its corresponding anti-particle $\overline{X}$ as a function of √sNN for 0–80% central Au+Au collisions.
The difference in the v_2 values between a particle X and its corresponding anti-particle $\overline{X}$ as a function of √sNN for 0–80% central Au+Au collisions.
The difference in the v_2 values between a particle X and its corresponding anti-particle $\overline{X}$ as a function of √sNN for 0–80% central Au+Au collisions.
The difference in the v_2 values between a particle X and its corresponding anti-particle $\overline{X}$ as a function of √sNN for 0–80% central Au+Au collisions.
The difference in the v_2 values between a particle X and its corresponding anti-particle $\overline{X}$ as a function of √sNN for 0–80% central Au+Au collisions.
The difference in the v_2 values between a particle X and its corresponding anti-particle $\overline{X}$ as a function of $μ_B$ for 0–80% central Au+Au collisions.
The difference in the v_2 values between a particle X and its corresponding anti-particle $\overline{X}$ as a function of $μ_B$ for 0–80% central Au+Au collisions.
The difference in the v_2 values between a particle X and its corresponding anti-particle $\overline{X}$ as a function of $μ_B$ for 0–80% central Au+Au collisions.
The difference in the v_2 values between a particle X and its corresponding anti-particle $\overline{X}$ as a function of $μ_B$ for 0–80% central Au+Au collisions.
The difference in the v_2 values between a particle X and its corresponding anti-particle $\overline{X}$ as a function of $μ_B$ for 0–80% central Au+Au collisions.
The proton and anti-proton elliptic flow for 0–80% central Au+Au collisions at √sNN= 19.6 GeV, where “(+,-) EP” refers to the event plane reconstructed using all of the charged particles and “(-) EP” refers to the event plane reconstructed using only the negatively charged particles.
We present STAR measurements of azimuthal anisotropy by means of the two- and four-particle cumulants $v_2$ ($v_2\{2\}$ and $v_2\{4\}$) for Au+Au and Cu+Cu collisions at center of mass energies $\sqrt{s_{_{\mathrm{NN}}}} = 62.4$ and 200 GeV. The difference between $v_2\{2\}^2$ and $v_2\{4\}^2$ is related to $v_{2}$ fluctuations ($\sigma_{v_2}$) and nonflow $(\delta_{2})$. We present an upper limit to $\sigma_{v_2}/v_{2}$. Following the assumption that eccentricity fluctuations $\sigma_{\epsilon}$ dominate $v_2$ fluctuations $\frac{\sigma_{v_2}}{v_2} \approx \frac{\sigma_{\epsilon}}{\epsilon}$ we deduce the nonflow implied for several models of eccentricity fluctuations that would be required for consistency with $v_2\{2\}$ and $v_2\{4\}$. We also present results on the ratio of $v_2$ to eccentricity.
The inclusive $J/\psi$ transverse momentum ($p_{T}$) spectra and nuclear modification factors are reported at midrapidity ($|y|<1.0$) in Au+Au collisions at $\sqrt{s_{NN}}=$ 39, 62.4 and 200 GeV taken by the STAR experiment. A suppression of $J/\psi$ production, with respect to {\color{black}the production in $p+p$ scaled by the number of binary nucleon-nucleon collisions}, is observed in central Au+Au collisions at these three energies. No significant energy dependence of nuclear modification factors is found within uncertainties. The measured nuclear modification factors can be described by model calculations that take into account both suppression of direct $J/\psi$ production due to the color screening effect and $J/\psi$ regeneration from recombination of uncorrelated charm-anticharm quark pairs.
We present STAR measurements of the azimuthal anisotropy parameter $v_2$ for pions, kaons, protons, $\Lambda$, $\bar{\Lambda}$, $\Xi+\bar{\Xi}$, and $\Omega + \bar{\Omega}$, along with $v_4$ for pions, kaons, protons, and $\Lambda + \bar{\Lambda}$ at mid-rapidity for Au+Au collisions at $\sqrt{s_{_{NN}}}=62.4$ and 200 GeV. The $v_2(p_T)$ values for all hadron species at 62.4 GeV are similar to those observed in 130 and 200 GeV collisions. For observed kinematic ranges, $v_2$ values at 62.4, 130, and 200 GeV are as little as 10%--15% larger than those in Pb+Pb collisions at $\sqrt{s_{_{NN}}}=17.3$ GeV. At intermediate transverse momentum ($p_T$ from 1.5--5 GeV/c), the 62.4 GeV $v_2(p_T)$ and $v_4(p_T)$ values are consistent with the quark-number scaling first observed at 200 GeV. A four-particle cumulant analysis is used to assess the non-flow contributions to pions and protons and some indications are found for a smaller non-flow contribution to protons than pions. Baryon $v_2$ is larger than anti-baryon $v_2$ at 62.4 and 200 GeV perhaps indicating either that the initial spatial net-baryon distribution is anisotropic, that the mechanism leading to transport of baryon number from beam- to mid-rapidity enhances $v_2$, or that anti-baryon and baryon annihilation is larger in the in-plane direction.
Minimum-bias (0–80% of the collision cross section) v2(pT ) for identified hadrons at |η| < 1 from Au+Au collisions at √sNN = 62.4 GeV. To facilitate comparisons between panels, v2 values for inclusive charged hadrons are displayed in each panel. The error bars on the data points represent statistical uncertainties. Systematic uncertainties for the identified particles are shown as shaded bands around v2 = 0.
Minimum-bias (0–80% of the collision cross section) v2(pT ) for identified hadrons at |η| < 1 from Au+Au collisions at √sNN = 62.4 GeV. To facilitate comparisons between panels, v2 values for inclusive charged hadrons are displayed in each panel. The error bars on the data points represent statistical uncertainties. Systematic uncertainties for the identified particles are shown as shaded bands around v2 = 0.
Minimum-bias (0–80% of the collision cross section) v2(pT ) for identified hadrons at |η| < 1 from Au+Au collisions at √sNN = 62.4 GeV. To facilitate comparisons between panels, v2 values for inclusive charged hadrons are displayed in each panel. The error bars on the data points represent statistical uncertainties. Systematic uncertainties for the identified particles are shown as shaded bands around v2 = 0.
Minimum-bias (0–80% of the collision cross section) v2(pT ) for identified hadrons at |η| < 1 from Au+Au collisions at √sNN = 62.4 GeV. To facilitate comparisons between panels, v2 values for inclusive charged hadrons are displayed in each panel. The error bars on the data points represent statistical uncertainties. Systematic uncertainties for the identified particles are shown as shaded bands around v2 = 0.
Minimum-bias (0–80% of the collision cross section) v2(pT ) for identified hadrons at |η| < 1 from Au+Au collisions at √sNN = 62.4 GeV. To facilitate comparisons between panels, v2 values for inclusive charged hadrons are displayed in each panel. The error bars on the data points represent statistical uncertainties. Systematic uncertainties for the identified particles are shown as shaded bands around v2 = 0.
Minimum-bias (0–80% of the collision cross section) v2(pT ) for identified hadrons at |η| < 1 from Au+Au collisions at √sNN = 62.4 GeV. To facilitate comparisons between panels, v2 values for inclusive charged hadrons are displayed in each panel. The error bars on the data points represent statistical uncertainties. Systematic uncertainties for the identified particles are shown as shaded bands around v2 = 0.
Minimum-bias (0–80% of the collision cross section) v2(pT ) for identified hadrons at |η| < 1 from Au+Au collisions at √sNN = 62.4 GeV. To facilitate comparisons between panels, v2 values for inclusive charged hadrons are displayed in each panel. The error bars on the data points represent statistical uncertainties. Systematic uncertainties for the identified particles are shown as shaded bands around v2 = 0.
Minimum-bias (0–80% of the collision cross section) v2(pT ) for identified hadrons at |η| < 1 from Au+Au collisions at √sNN = 62.4 GeV. To facilitate comparisons between panels, v2 values for inclusive charged hadrons are displayed in each panel. The error bars on the data points represent statistical uncertainties. Systematic uncertainties for the identified particles are shown as shaded bands around v2 = 0.
Minimum-bias (0–80% of the collision cross section) v2(pT ) for identified hadrons at |η| < 1 from Au+Au collisions at √sNN = 62.4 GeV. To facilitate comparisons between panels, v2 values for inclusive charged hadrons are displayed in each panel. The error bars on the data points represent statistical uncertainties. Systematic uncertainties for the identified particles are shown as shaded bands around v2 = 0.
Minimum-bias (0–80% of the collision cross section) v2(pT ) for identified hadrons at |η| < 1 from Au+Au collisions at √sNN = 62.4 GeV. To facilitate comparisons between panels, v2 values for inclusive charged hadrons are displayed in each panel. The error bars on the data points represent statistical uncertainties. Systematic uncertainties for the identified particles are shown as shaded bands around v2 = 0.
Minimum-bias (0–80% of the collision cross section) v2(pT ) for identified hadrons at |η| < 1 from Au+Au collisions at √sNN = 62.4 GeV. To facilitate comparisons between panels, v2 values for inclusive charged hadrons are displayed in each panel. The error bars on the data points represent statistical uncertainties. Systematic uncertainties for the identified particles are shown as shaded bands around v2 = 0.
Minimum-bias (0–80% of the collision cross section) v2(pT ) for identified hadrons at |η| < 1 from Au+Au collisions at √sNN = 62.4 GeV. To facilitate comparisons between panels, v2 values for inclusive charged hadrons are displayed in each panel. The error bars on the data points represent statistical uncertainties. Systematic uncertainties for the identified particles are shown as shaded bands around v2 = 0.
Minimum-bias (0–80% of the collision cross section) v2(pT ) for identified hadrons at |η| < 1 from Au+Au collisions at √sNN = 62.4 GeV. To facilitate comparisons between panels, v2 values for inclusive charged hadrons are displayed in each panel. The error bars on the data points represent statistical uncertainties. Systematic uncertainties for the identified particles are shown as shaded bands around v2 = 0.
Minimum-bias (0–80% of the collision cross section) v2(pT ) for identified hadrons at |η| < 1 from Au+Au collisions at √sNN = 62.4 GeV. To facilitate comparisons between panels, v2 values for inclusive charged hadrons are displayed in each panel. The error bars on the data points represent statistical uncertainties. Systematic uncertainties for the identified particles are shown as shaded bands around v2 = 0.
Minimum-bias (0–80% of the collision cross section) v2(pT ) for identified hadrons at |η| < 1 from Au+Au collisions at √sNN = 62.4 GeV. To facilitate comparisons between panels, v2 values for inclusive charged hadrons are displayed in each panel. The error bars on the data points represent statistical uncertainties. Systematic uncertainties for the identified particles are shown as shaded bands around v2 = 0.
Minimum-bias (0–80% of the collision cross section) v2(pT ) for identified hadrons at |η| < 1 from Au+Au collisions at √sNN = 62.4 GeV. To facilitate comparisons between panels, v2 values for inclusive charged hadrons are displayed in each panel. The error bars on the data points represent statistical uncertainties. Systematic uncertainties for the identified particles are shown as shaded bands around v2 = 0.
The unidentified charged hadron, charged pion, $K^0_S$, charged kaon, proton and Λ+Λ v2 as a function of pT for 10%–40%, 0%–10% and 40%–80% of the Au+Au interaction cross section at √sNN = 62.4 GeV. Weak-decay feed-down errors are included in the error bars on the data points while non-flow and tracking error uncertainties are plotted as bands around v2 = 0, which apply to all identified particles. The errors are asymmetric and the portion of the error band above (below) zero represents the negative (positive) error.
The unidentified charged hadron, charged pion, $K^0_S$, charged kaon, proton and Λ+Λ v2 as a function of pT for 10%–40%, 0%–10% and 40%–80% of the Au+Au interaction cross section at √sNN = 62.4 GeV. Weak-decay feed-down errors are included in the error bars on the data points while non-flow and tracking error uncertainties are plotted as bands around v2 = 0, which apply to all identified particles. The errors are asymmetric and the portion of the error band above (below) zero represents the negative (positive) error.
The unidentified charged hadron, charged pion, $K^0_S$, charged kaon, proton and Λ+Λ v2 as a function of pT for 10%–40%, 0%–10% and 40%–80% of the Au+Au interaction cross section at √sNN = 62.4 GeV. Weak-decay feed-down errors are included in the error bars on the data points while non-flow and tracking error uncertainties are plotted as bands around v2 = 0, which apply to all identified particles. The errors are asymmetric and the portion of the error band above (below) zero represents the negative (positive) error.
The unidentified charged hadron, charged pion, $K^0_S$, charged kaon, proton and Λ+Λ v2 as a function of pT for 10%–40%, 0%–10% and 40%–80% of the Au+Au interaction cross section at √sNN = 62.4 GeV. Weak-decay feed-down errors are included in the error bars on the data points while non-flow and tracking error uncertainties are plotted as bands around v2 = 0, which apply to all identified particles. The errors are asymmetric and the portion of the error band above (below) zero represents the negative (positive) error.
The unidentified charged hadron, charged pion, $K^0_S$, charged kaon, proton and Λ+Λ v2 as a function of pT for 10%–40%, 0%–10% and 40%–80% of the Au+Au interaction cross section at √sNN = 62.4 GeV. Weak-decay feed-down errors are included in the error bars on the data points while non-flow and tracking error uncertainties are plotted as bands around v2 = 0, which apply to all identified particles. The errors are asymmetric and the portion of the error band above (below) zero represents the negative (positive) error.
The unidentified charged hadron, charged pion, $K^0_S$, charged kaon, proton and Λ+Λ v2 as a function of pT for 10%–40%, 0%–10% and 40%–80% of the Au+Au interaction cross section at √sNN = 62.4 GeV. Weak-decay feed-down errors are included in the error bars on the data points while non-flow and tracking error uncertainties are plotted as bands around v2 = 0, which apply to all identified particles. The errors are asymmetric and the portion of the error band above (below) zero represents the negative (positive) error.
The unidentified charged hadron, charged pion, $K^0_S$, charged kaon, proton and Λ+Λ v2 as a function of pT for 10%–40%, 0%–10% and 40%–80% of the Au+Au interaction cross section at √sNN = 62.4 GeV. Weak-decay feed-down errors are included in the error bars on the data points while non-flow and tracking error uncertainties are plotted as bands around v2 = 0, which apply to all identified particles. The errors are asymmetric and the portion of the error band above (below) zero represents the negative (positive) error.
The unidentified charged hadron, charged pion, $K^0_S$, charged kaon, proton and Λ+Λ v2 as a function of pT for 10%–40%, 0%–10% and 40%–80% of the Au+Au interaction cross section at √sNN = 62.4 GeV. Weak-decay feed-down errors are included in the error bars on the data points while non-flow and tracking error uncertainties are plotted as bands around v2 = 0, which apply to all identified particles. The errors are asymmetric and the portion of the error band above (below) zero represents the negative (positive) error.
The unidentified charged hadron, charged pion, $K^0_S$, charged kaon, proton and Λ+Λ v2 as a function of pT for 10%–40%, 0%–10% and 40%–80% of the Au+Au interaction cross section at √sNN = 62.4 GeV. Weak-decay feed-down errors are included in the error bars on the data points while non-flow and tracking error uncertainties are plotted as bands around v2 = 0, which apply to all identified particles. The errors are asymmetric and the portion of the error band above (below) zero represents the negative (positive) error.
The unidentified charged hadron, charged pion, $K^0_S$, charged kaon, proton and Λ+Λ v2 as a function of pT for 10%–40%, 0%–10% and 40%–80% of the Au+Au interaction cross section at √sNN = 62.4 GeV. Weak-decay feed-down errors are included in the error bars on the data points while non-flow and tracking error uncertainties are plotted as bands around v2 = 0, which apply to all identified particles. The errors are asymmetric and the portion of the error band above (below) zero represents the negative (positive) error.
The unidentified charged hadron, charged pion, $K^0_S$, charged kaon, proton and Λ+Λ v2 as a function of pT for 10%–40%, 0%–10% and 40%–80% of the Au+Au interaction cross section at √sNN = 62.4 GeV. Weak-decay feed-down errors are included in the error bars on the data points while non-flow and tracking error uncertainties are plotted as bands around v2 = 0, which apply to all identified particles. The errors are asymmetric and the portion of the error band above (below) zero represents the negative (positive) error.
The unidentified charged hadron, charged pion, $K^0_S$, charged kaon, proton and Λ+Λ v2 as a function of pT for 10%–40%, 0%–10% and 40%–80% of the Au+Au interaction cross section at √sNN = 62.4 GeV. Weak-decay feed-down errors are included in the error bars on the data points while non-flow and tracking error uncertainties are plotted as bands around v2 = 0, which apply to all identified particles. The errors are asymmetric and the portion of the error band above (below) zero represents the negative (positive) error.
The unidentified charged hadron, charged pion, $K^0_S$, charged kaon, proton and Λ+Λ v2 as a function of pT for 10%–40%, 0%–10% and 40%–80% of the Au+Au interaction cross section at √sNN = 62.4 GeV. Weak-decay feed-down errors are included in the error bars on the data points while non-flow and tracking error uncertainties are plotted as bands around v2 = 0, which apply to all identified particles. The errors are asymmetric and the portion of the error band above (below) zero represents the negative (positive) error.
The unidentified charged hadron, charged pion, $K^0_S$, charged kaon, proton and Λ+Λ v2 as a function of pT for 10%–40%, 0%–10% and 40%–80% of the Au+Au interaction cross section at √sNN = 62.4 GeV. Weak-decay feed-down errors are included in the error bars on the data points while non-flow and tracking error uncertainties are plotted as bands around v2 = 0, which apply to all identified particles. The errors are asymmetric and the portion of the error band above (below) zero represents the negative (positive) error.
The unidentified charged hadron, charged pion, $K^0_S$, charged kaon, proton and Λ+Λ v2 as a function of pT for 10%–40%, 0%–10% and 40%–80% of the Au+Au interaction cross section at √sNN = 62.4 GeV. Weak-decay feed-down errors are included in the error bars on the data points while non-flow and tracking error uncertainties are plotted as bands around v2 = 0, which apply to all identified particles. The errors are asymmetric and the portion of the error band above (below) zero represents the negative (positive) error.
The unidentified charged hadron, charged pion, $K^0_S$, charged kaon, proton and Λ+Λ v2 as a function of pT for 10%–40%, 0%–10% and 40%–80% of the Au+Au interaction cross section at √sNN = 62.4 GeV. Weak-decay feed-down errors are included in the error bars on the data points while non-flow and tracking error uncertainties are plotted as bands around v2 = 0, which apply to all identified particles. The errors are asymmetric and the portion of the error band above (below) zero represents the negative (positive) error.
The unidentified charged hadron, charged pion, $K^0_S$, charged kaon, proton and Λ+Λ v2 as a function of pT for 10%–40%, 0%–10% and 40%–80% of the Au+Au interaction cross section at √sNN = 62.4 GeV. Weak-decay feed-down errors are included in the error bars on the data points while non-flow and tracking error uncertainties are plotted as bands around v2 = 0, which apply to all identified particles. The errors are asymmetric and the portion of the error band above (below) zero represents the negative (positive) error.
The unidentified charged hadron, charged pion, $K^0_S$, charged kaon, proton and Λ+Λ v2 as a function of pT for 10%–40%, 0%–10% and 40%–80% of the Au+Au interaction cross section at √sNN = 62.4 GeV. Weak-decay feed-down errors are included in the error bars on the data points while non-flow and tracking error uncertainties are plotted as bands around v2 = 0, which apply to all identified particles. The errors are asymmetric and the portion of the error band above (below) zero represents the negative (positive) error.
The unidentified charged hadron, charged pion, $K^0_S$, charged kaon, proton and Λ+Λ v2 as a function of pT for 10%–40%, 0%–10% and 40%–80% of the Au+Au interaction cross section at √sNN = 62.4 GeV. Weak-decay feed-down errors are included in the error bars on the data points while non-flow and tracking error uncertainties are plotted as bands around v2 = 0, which apply to all identified particles. The errors are asymmetric and the portion of the error band above (below) zero represents the negative (positive) error.
The unidentified charged hadron, charged pion, $K^0_S$, charged kaon, proton and Λ+Λ v2 as a function of pT for 10%–40%, 0%–10% and 40%–80% of the Au+Au interaction cross section at √sNN = 62.4 GeV. Weak-decay feed-down errors are included in the error bars on the data points while non-flow and tracking error uncertainties are plotted as bands around v2 = 0, which apply to all identified particles. The errors are asymmetric and the portion of the error band above (below) zero represents the negative (positive) error.
The unidentified charged hadron, charged pion, $K^0_S$, charged kaon, proton and Λ+Λ v2 as a function of pT for 10%–40%, 0%–10% and 40%–80% of the Au+Au interaction cross section at √sNN = 62.4 GeV. Weak-decay feed-down errors are included in the error bars on the data points while non-flow and tracking error uncertainties are plotted as bands around v2 = 0, which apply to all identified particles. The errors are asymmetric and the portion of the error band above (below) zero represents the negative (positive) error.
The unidentified charged hadron, charged pion, $K^0_S$, charged kaon, proton and Λ+Λ v2 as a function of pT for 10%–40%, 0%–10% and 40%–80% of the Au+Au interaction cross section at √sNN = 62.4 GeV. Weak-decay feed-down errors are included in the error bars on the data points while non-flow and tracking error uncertainties are plotted as bands around v2 = 0, which apply to all identified particles. The errors are asymmetric and the portion of the error band above (below) zero represents the negative (positive) error.
The unidentified charged hadron, charged pion, $K^0_S$, charged kaon, proton and Λ+Λ v2 as a function of pT for 10%–40%, 0%–10% and 40%–80% of the Au+Au interaction cross section at √sNN = 62.4 GeV. Weak-decay feed-down errors are included in the error bars on the data points while non-flow and tracking error uncertainties are plotted as bands around v2 = 0, which apply to all identified particles. The errors are asymmetric and the portion of the error band above (below) zero represents the negative (positive) error.
The unidentified charged hadron, charged pion, $K^0_S$, charged kaon, proton and Λ+Λ v2 as a function of pT for 10%–40%, 0%–10% and 40%–80% of the Au+Au interaction cross section at √sNN = 62.4 GeV. Weak-decay feed-down errors are included in the error bars on the data points while non-flow and tracking error uncertainties are plotted as bands around v2 = 0, which apply to all identified particles. The errors are asymmetric and the portion of the error band above (below) zero represents the negative (positive) error.
The ratio of Λ v2 to Λbar v2. The data are from minimum bias Au+Au collisions at √sNN = 62.4 and 200 GeV. The bands show the average values of the ratios within the indicated pT ranges.
The ratio of Λ v2 to Λbar v2. The data are from minimum bias Au+Au collisions at √sNN = 62.4 and 200 GeV. The bands show the average values of the ratios within the indicated pT ranges.
The pT integrated ratio of Λ v2 to Λbar v2 for three centrality intervals 0%–10%, 10%–40%, and 40%–80%. The data are from Au+Au collisions at √sNN = 62.4 and 200 GeV.
The pT integrated ratio of Λ v2 to Λbar v2 for three centrality intervals 0%–10%, 10%–40%, and 40%–80%. The data are from Au+Au collisions at √sNN = 62.4 and 200 GeV.
Identified particle v2 from minimum bias collisions at √sNN = 62.4 GeV scaled by the number of valence quarks in the hadron (nq) and plotted versus pT/nq (a) and (mT − m0)/nq (b). In each case a polynomial curve is fit to all particles except pions. The ratio of v2/nq to the fit function is shown in the bottom panels (c) and (d).
Identified particle v2 from minimum bias collisions at √sNN = 62.4 GeV scaled by the number of valence quarks in the hadron (nq) and plotted versus pT/nq (a) and (mT − m0)/nq (b). In each case a polynomial curve is fit to all particles except pions. The ratio of v2/nq to the fit function is shown in the bottom panels (c) and (d).
Identified particle v2 from minimum bias collisions at √sNN = 62.4 GeV scaled by the number of valence quarks in the hadron (nq) and plotted versus pT/nq (a) and (mT − m0)/nq (b). In each case a polynomial curve is fit to all particles except pions. The ratio of v2/nq to the fit function is shown in the bottom panels (c) and (d).
Identified particle v2 from minimum bias collisions at √sNN = 62.4 GeV scaled by the number of valence quarks in the hadron (nq) and plotted versus pT/nq (a) and (mT − m0)/nq (b). In each case a polynomial curve is fit to all particles except pions. The ratio of v2/nq to the fit function is shown in the bottom panels (c) and (d).
Identified particle v2 from minimum bias collisions at √sNN = 62.4 GeV scaled by the number of valence quarks in the hadron (nq) and plotted versus pT/nq (a) and (mT − m0)/nq (b). In each case a polynomial curve is fit to all particles except pions. The ratio of v2/nq to the fit function is shown in the bottom panels (c) and (d).
Identified particle v2 from minimum bias collisions at √sNN = 62.4 GeV scaled by the number of valence quarks in the hadron (nq) and plotted versus pT/nq (a) and (mT − m0)/nq (b). In each case a polynomial curve is fit to all particles except pions. The ratio of v2/nq to the fit function is shown in the bottom panels (c) and (d).
Identified particle v2 from minimum bias collisions at √sNN = 62.4 GeV scaled by the number of valence quarks in the hadron (nq) and plotted versus pT/nq (a) and (mT − m0)/nq (b). In each case a polynomial curve is fit to all particles except pions. The ratio of v2/nq to the fit function is shown in the bottom panels (c) and (d).
Identified particle v2 from minimum bias collisions at √sNN = 62.4 GeV scaled by the number of valence quarks in the hadron (nq) and plotted versus pT/nq (a) and (mT − m0)/nq (b). In each case a polynomial curve is fit to all particles except pions. The ratio of v2/nq to the fit function is shown in the bottom panels (c) and (d).
Identified particle v2 from minimum bias collisions at √sNN = 62.4 GeV scaled by the number of valence quarks in the hadron (nq) and plotted versus pT/nq (a) and (mT − m0)/nq (b). In each case a polynomial curve is fit to all particles except pions. The ratio of v2/nq to the fit function is shown in the bottom panels (c) and (d).
Identified particle v2 from minimum bias collisions at √sNN = 62.4 GeV scaled by the number of valence quarks in the hadron (nq) and plotted versus pT/nq (a) and (mT − m0)/nq (b). In each case a polynomial curve is fit to all particles except pions. The ratio of v2/nq to the fit function is shown in the bottom panels (c) and (d).
Identified particle v2 from minimum bias collisions at √sNN = 62.4 GeV scaled by the number of valence quarks in the hadron (nq) and plotted versus pT/nq (a) and (mT − m0)/nq (b). In each case a polynomial curve is fit to all particles except pions. The ratio of v2/nq to the fit function is shown in the bottom panels (c) and (d).
Identified particle v2 from minimum bias collisions at √sNN = 62.4 GeV scaled by the number of valence quarks in the hadron (nq) and plotted versus pT/nq (a) and (mT − m0)/nq (b). In each case a polynomial curve is fit to all particles except pions. The ratio of v2/nq to the fit function is shown in the bottom panels (c) and (d).
Identified particle v2 from minimum bias collisions at √sNN = 62.4 GeV scaled by the number of valence quarks in the hadron (nq) and plotted versus pT/nq (a) and (mT − m0)/nq (b). In each case a polynomial curve is fit to all particles except pions. The ratio of v2/nq to the fit function is shown in the bottom panels (c) and (d).
Identified particle v2 from minimum bias collisions at √sNN = 62.4 GeV scaled by the number of valence quarks in the hadron (nq) and plotted versus pT/nq (a) and (mT − m0)/nq (b). In each case a polynomial curve is fit to all particles except pions. The ratio of v2/nq to the fit function is shown in the bottom panels (c) and (d).
Identified particle v2 from minimum bias collisions at √sNN = 62.4 GeV scaled by the number of valence quarks in the hadron (nq) and plotted versus pT/nq (a) and (mT − m0)/nq (b). In each case a polynomial curve is fit to all particles except pions. The ratio of v2/nq to the fit function is shown in the bottom panels (c) and (d).
Identified particle v2 from minimum bias collisions at √sNN = 62.4 GeV scaled by the number of valence quarks in the hadron (nq) and plotted versus pT/nq (a) and (mT − m0)/nq (b). In each case a polynomial curve is fit to all particles except pions. The ratio of v2/nq to the fit function is shown in the bottom panels (c) and (d).
Identified particle v2 from minimum bias collisions at √sNN = 62.4 GeV scaled by the number of valence quarks in the hadron (nq) and plotted versus pT/nq (a) and (mT − m0)/nq (b). In each case a polynomial curve is fit to all particles except pions. The ratio of v2/nq to the fit function is shown in the bottom panels (c) and (d).
Identified particle v2 from minimum bias collisions at √sNN = 62.4 GeV scaled by the number of valence quarks in the hadron (nq) and plotted versus pT/nq (a) and (mT − m0)/nq (b). In each case a polynomial curve is fit to all particles except pions. The ratio of v2/nq to the fit function is shown in the bottom panels (c) and (d).
Identified particle v2 from minimum bias collisions at √sNN = 62.4 GeV scaled by the number of valence quarks in the hadron (nq) and plotted versus pT/nq (a) and (mT − m0)/nq (b). In each case a polynomial curve is fit to all particles except pions. The ratio of v2/nq to the fit function is shown in the bottom panels (c) and (d).
Identified particle v2 from minimum bias collisions at √sNN = 62.4 GeV scaled by the number of valence quarks in the hadron (nq) and plotted versus pT/nq (a) and (mT − m0)/nq (b). In each case a polynomial curve is fit to all particles except pions. The ratio of v2/nq to the fit function is shown in the bottom panels (c) and (d).
Identified particle v2 from minimum bias collisions at √sNN = 62.4 GeV scaled by the number of valence quarks in the hadron (nq) and plotted versus pT/nq (a) and (mT − m0)/nq (b). In each case a polynomial curve is fit to all particles except pions. The ratio of v2/nq to the fit function is shown in the bottom panels (c) and (d).
Identified particle v2 from minimum bias collisions at √sNN = 62.4 GeV scaled by the number of valence quarks in the hadron (nq) and plotted versus pT/nq (a) and (mT − m0)/nq (b). In each case a polynomial curve is fit to all particles except pions. The ratio of v2/nq to the fit function is shown in the bottom panels (c) and (d).
Identified particle v2 from minimum bias collisions at √sNN = 62.4 GeV scaled by the number of valence quarks in the hadron (nq) and plotted versus pT/nq (a) and (mT − m0)/nq (b). In each case a polynomial curve is fit to all particles except pions. The ratio of v2/nq to the fit function is shown in the bottom panels (c) and (d).
Identified particle v2 from minimum bias collisions at √sNN = 62.4 GeV scaled by the number of valence quarks in the hadron (nq) and plotted versus pT/nq (a) and (mT − m0)/nq (b). In each case a polynomial curve is fit to all particles except pions. The ratio of v2/nq to the fit function is shown in the bottom panels (c) and (d).
Identified particle v2 from minimum bias collisions at √sNN = 62.4 GeV scaled by the number of valence quarks in the hadron (nq) and plotted versus pT/nq (a) and (mT − m0)/nq (b). In each case a polynomial curve is fit to all particles except pions. The ratio of v2/nq to the fit function is shown in the bottom panels (c) and (d).
Identified particle v2 from minimum bias collisions at √sNN = 62.4 GeV scaled by the number of valence quarks in the hadron (nq) and plotted versus pT/nq (a) and (mT − m0)/nq (b). In each case a polynomial curve is fit to all particles except pions. The ratio of v2/nq to the fit function is shown in the bottom panels (c) and (d).
Identified particle v2 from minimum bias collisions at √sNN = 62.4 GeV scaled by the number of valence quarks in the hadron (nq) and plotted versus pT/nq (a) and (mT − m0)/nq (b). In each case a polynomial curve is fit to all particles except pions. The ratio of v2/nq to the fit function is shown in the bottom panels (c) and (d).
Identified particle v2 from minimum bias collisions at √sNN = 62.4 GeV scaled by the number of valence quarks in the hadron (nq) and plotted versus pT/nq (a) and (mT − m0)/nq (b). In each case a polynomial curve is fit to all particles except pions. The ratio of v2/nq to the fit function is shown in the bottom panels (c) and (d).
Identified particle v2 from minimum bias collisions at √sNN = 62.4 GeV scaled by the number of valence quarks in the hadron (nq) and plotted versus pT/nq (a) and (mT − m0)/nq (b). In each case a polynomial curve is fit to all particles except pions. The ratio of v2/nq to the fit function is shown in the bottom panels (c) and (d).
v2/nq scaled by the mean eccentricity of the initial overlap region versus (mT − m0)/nq for 0%–10%, 10%–40%, and 40%–80% most central Au+Au collisions at √sNN = 62.4 GeV.
v2/nq scaled by the mean eccentricity of the initial overlap region versus (mT − m0)/nq for 0%–10%, 10%–40%, and 40%–80% most central Au+Au collisions at √sNN = 62.4 GeV.
v2/nq scaled by the mean eccentricity of the initial overlap region versus (mT − m0)/nq for 0%–10%, 10%–40%, and 40%–80% most central Au+Au collisions at √sNN = 62.4 GeV.
v2/nq scaled by the mean eccentricity of the initial overlap region versus (mT − m0)/nq for 0%–10%, 10%–40%, and 40%–80% most central Au+Au collisions at √sNN = 62.4 GeV.
v2/nq scaled by the mean eccentricity of the initial overlap region versus (mT − m0)/nq for 0%–10%, 10%–40%, and 40%–80% most central Au+Au collisions at √sNN = 62.4 GeV.
v2/nq scaled by the mean eccentricity of the initial overlap region versus (mT − m0)/nq for 0%–10%, 10%–40%, and 40%–80% most central Au+Au collisions at √sNN = 62.4 GeV.
v2/nq scaled by the mean eccentricity of the initial overlap region versus (mT − m0)/nq for 0%–10%, 10%–40%, and 40%–80% most central Au+Au collisions at √sNN = 62.4 GeV.
v2/nq scaled by the mean eccentricity of the initial overlap region versus (mT − m0)/nq for 0%–10%, 10%–40%, and 40%–80% most central Au+Au collisions at √sNN = 62.4 GeV.
v2/nq scaled by the mean eccentricity of the initial overlap region versus (mT − m0)/nq for 0%–10%, 10%–40%, and 40%–80% most central Au+Au collisions at √sNN = 62.4 GeV.
v2/nq scaled by the mean eccentricity of the initial overlap region versus (mT − m0)/nq for 0%–10%, 10%–40%, and 40%–80% most central Au+Au collisions at √sNN = 62.4 GeV.
v2/nq scaled by the mean eccentricity of the initial overlap region versus (mT − m0)/nq for 0%–10%, 10%–40%, and 40%–80% most central Au+Au collisions at √sNN = 62.4 GeV.
v2/nq scaled by the mean eccentricity of the initial overlap region versus (mT − m0)/nq for 0%–10%, 10%–40%, and 40%–80% most central Au+Au collisions at √sNN = 62.4 GeV.
v2/nq scaled by the mean eccentricity of the initial overlap region versus (mT − m0)/nq for 0%–10%, 10%–40%, and 40%–80% most central Au+Au collisions at √sNN = 62.4 GeV.
v2/nq scaled by the mean eccentricity of the initial overlap region versus (mT − m0)/nq for 0%–10%, 10%–40%, and 40%–80% most central Au+Au collisions at √sNN = 62.4 GeV.
v2/nq scaled by the mean eccentricity of the initial overlap region versus (mT − m0)/nq for 0%–10%, 10%–40%, and 40%–80% most central Au+Au collisions at √sNN = 62.4 GeV.
v2/nq scaled by the mean eccentricity of the initial overlap region versus (mT − m0)/nq for 0%–10%, 10%–40%, and 40%–80% most central Au+Au collisions at √sNN = 62.4 GeV.
v2/nq scaled by the mean eccentricity of the initial overlap region versus (mT − m0)/nq for 0%–10%, 10%–40%, and 40%–80% most central Au+Au collisions at √sNN = 62.4 GeV.
Top panels - minimum bias $v_4$ for pions, charged kaons, $K^0_S$, anti-protons and Λ + Λbar at √sNN = 62.4 GeV. In the left panel the solid (dashed) line shows thevalue for $v_2^2$ for pions (kaons). Intheright panel the dashedline is $v_2^2$ for Λ + Λbar. Bottom panels - $v_4$ scaled by $v_2^2$ (points where $v_4$ and $v_2$ fluctuate around zero are not plotted). Grey bands correspond to the fit results described in the text and Table II. The systematic errors on the $v_4/v_2^2$ ratio from nonflow are included in the error bars leading to asymmetric errors.
Top panels - minimum bias $v_4$ for pions, charged kaons, $K^0_S$, anti-protons and Λ + Λbar at √sNN = 62.4 GeV. In the left panel the solid (dashed) line shows thevalue for $v_2^2$ for pions (kaons). Intheright panel the dashedline is $v_2^2$ for Λ + Λbar. Bottom panels - $v_4$ scaled by $v_2^2$ (points where $v_4$ and $v_2$ fluctuate around zero are not plotted). Grey bands correspond to the fit results described in the text and Table II. The systematic errors on the $v_4/v_2^2$ ratio from nonflow are included in the error bars leading to asymmetric errors.
Top panels - minimum bias $v_4$ for pions, charged kaons, $K^0_S$, anti-protons and Λ + Λbar at √sNN = 62.4 GeV. In the left panel the solid (dashed) line shows thevalue for $v_2^2$ for pions (kaons). Intheright panel the dashedline is $v_2^2$ for Λ + Λbar. Bottom panels - $v_4$ scaled by $v_2^2$ (points where $v_4$ and $v_2$ fluctuate around zero are not plotted). Grey bands correspond to the fit results described in the text and Table II. The systematic errors on the $v_4/v_2^2$ ratio from nonflow are included in the error bars leading to asymmetric errors.
Top panels - minimum bias $v_4$ for pions, charged kaons, $K^0_S$, anti-protons and Λ + Λbar at √sNN = 62.4 GeV. In the left panel the solid (dashed) line shows thevalue for $v_2^2$ for pions (kaons). Intheright panel the dashedline is $v_2^2$ for Λ + Λbar. Bottom panels - $v_4$ scaled by $v_2^2$ (points where $v_4$ and $v_2$ fluctuate around zero are not plotted). Grey bands correspond to the fit results described in the text and Table II. The systematic errors on the $v_4/v_2^2$ ratio from nonflow are included in the error bars leading to asymmetric errors.
Top panels - minimum bias $v_4$ for pions, charged kaons, $K^0_S$, anti-protons and Λ + Λbar at √sNN = 62.4 GeV. In the left panel the solid (dashed) line shows thevalue for $v_2^2$ for pions (kaons). Intheright panel the dashedline is $v_2^2$ for Λ + Λbar. Bottom panels - $v_4$ scaled by $v_2^2$ (points where $v_4$ and $v_2$ fluctuate around zero are not plotted). Grey bands correspond to the fit results described in the text and Table II. The systematic errors on the $v_4/v_2^2$ ratio from nonflow are included in the error bars leading to asymmetric errors.
Top panels - minimum bias $v_4$ for pions, charged kaons, $K^0_S$, anti-protons and Λ + Λbar at √sNN = 62.4 GeV. In the left panel the solid (dashed) line shows thevalue for $v_2^2$ for pions (kaons). Intheright panel the dashedline is $v_2^2$ for Λ + Λbar. Bottom panels - $v_4$ scaled by $v_2^2$ (points where $v_4$ and $v_2$ fluctuate around zero are not plotted). Grey bands correspond to the fit results described in the text and Table II. The systematic errors on the $v_4/v_2^2$ ratio from nonflow are included in the error bars leading to asymmetric errors.
Top panels - minimum bias $v_4$ for pions, charged kaons, $K^0_S$, anti-protons and Λ + Λbar at √sNN = 62.4 GeV. In the left panel the solid (dashed) line shows thevalue for $v_2^2$ for pions (kaons). Intheright panel the dashedline is $v_2^2$ for Λ + Λbar. Bottom panels - $v_4$ scaled by $v_2^2$ (points where $v_4$ and $v_2$ fluctuate around zero are not plotted). Grey bands correspond to the fit results described in the text and Table II. The systematic errors on the $v_4/v_2^2$ ratio from nonflow are included in the error bars leading to asymmetric errors.
Top panels - minimum bias $v_4$ for pions, charged kaons, $K^0_S$, anti-protons and Λ + Λbar at √sNN = 62.4 GeV. In the left panel the solid (dashed) line shows thevalue for $v_2^2$ for pions (kaons). Intheright panel the dashedline is $v_2^2$ for Λ + Λbar. Bottom panels - $v_4$ scaled by $v_2^2$ (points where $v_4$ and $v_2$ fluctuate around zero are not plotted). Grey bands correspond to the fit results described in the text and Table II. The systematic errors on the $v_4/v_2^2$ ratio from nonflow are included in the error bars leading to asymmetric errors.
Top panel - $v_2$ for pions and protons at √sNN = 62.4 and 17.3 GeV. The 62.4 GeV data are from TOF and dE/dx measurements combined. Middle and bottom panel - ratios of $v_2$ for $\pi^++\pi^-$, $K^0_S$, p+p, Λ+Λbar and at different center-of-mass energies scaled by the values at 62.4 GeV. The grey and yellow bands represent systematic uncertainties in the v2 ratios arising from non-flow effects. The grey bands (above unity) are the uncertainties for the 200 GeV/62.4 GeV data and the yellow bands (below unity) are for the 17.3 GeV/62.4 GeV data.
Top panel - $v_2$ for pions and protons at √sNN = 62.4 and 17.3 GeV. The 62.4 GeV data are from TOF and dE/dx measurements combined. Middle and bottom panel - ratios of $v_2$ for $\pi^++\pi^-$, $K^0_S$, p+p, Λ+Λbar and at different center-of-mass energies scaled by the values at 62.4 GeV. The grey and yellow bands represent systematic uncertainties in the v2 ratios arising from non-flow effects. The grey bands (above unity) are the uncertainties for the 200 GeV/62.4 GeV data and the yellow bands (below unity) are for the 17.3 GeV/62.4 GeV data.
Top panel - $v_2$ for pions and protons at √sNN = 62.4 and 17.3 GeV. The 62.4 GeV data are from TOF and dE/dx measurements combined. Middle and bottom panel - ratios of $v_2$ for $\pi^++\pi^-$, $K^0_S$, p+p, Λ+Λbar and at different center-of-mass energies scaled by the values at 62.4 GeV. The grey and yellow bands represent systematic uncertainties in the v2 ratios arising from non-flow effects. The grey bands (above unity) are the uncertainties for the 200 GeV/62.4 GeV data and the yellow bands (below unity) are for the 17.3 GeV/62.4 GeV data.
Top panel - $v_2$ for pions and protons at √sNN = 62.4 and 17.3 GeV. The 62.4 GeV data are from TOF and dE/dx measurements combined. Middle and bottom panel - ratios of $v_2$ for $\pi^++\pi^-$, $K^0_S$, p+p, Λ+Λbar and at different center-of-mass energies scaled by the values at 62.4 GeV. The grey and yellow bands represent systematic uncertainties in the v2 ratios arising from non-flow effects. The grey bands (above unity) are the uncertainties for the 200 GeV/62.4 GeV data and the yellow bands (below unity) are for the 17.3 GeV/62.4 GeV data.
Top panel - $v_2$ for pions and protons at √sNN = 62.4 and 17.3 GeV. The 62.4 GeV data are from TOF and dE/dx measurements combined. Middle and bottom panel - ratios of $v_2$ for $\pi^++\pi^-$, $K^0_S$, p+p, Λ+Λbar and at different center-of-mass energies scaled by the values at 62.4 GeV. The grey and yellow bands represent systematic uncertainties in the v2 ratios arising from non-flow effects. The grey bands (above unity) are the uncertainties for the 200 GeV/62.4 GeV data and the yellow bands (below unity) are for the 17.3 GeV/62.4 GeV data.
Top panel - $v_2$ for pions and protons at √sNN = 62.4 and 17.3 GeV. The 62.4 GeV data are from TOF and dE/dx measurements combined. Middle and bottom panel - ratios of $v_2$ for $\pi^++\pi^-$, $K^0_S$, p+p, Λ+Λbar and at different center-of-mass energies scaled by the values at 62.4 GeV. The grey and yellow bands represent systematic uncertainties in the v2 ratios arising from non-flow effects. The grey bands (above unity) are the uncertainties for the 200 GeV/62.4 GeV data and the yellow bands (below unity) are for the 17.3 GeV/62.4 GeV data.
Top panel - $v_2$ for pions and protons at √sNN = 62.4 and 17.3 GeV. The 62.4 GeV data are from TOF and dE/dx measurements combined. Middle and bottom panel - ratios of $v_2$ for $\pi^++\pi^-$, $K^0_S$, p+p, Λ+Λbar and at different center-of-mass energies scaled by the values at 62.4 GeV. The grey and yellow bands represent systematic uncertainties in the v2 ratios arising from non-flow effects. The grey bands (above unity) are the uncertainties for the 200 GeV/62.4 GeV data and the yellow bands (below unity) are for the 17.3 GeV/62.4 GeV data.
Top panel - $v_2$ for pions and protons at √sNN = 62.4 and 17.3 GeV. The 62.4 GeV data are from TOF and dE/dx measurements combined. Middle and bottom panel - ratios of $v_2$ for $\pi^++\pi^-$, $K^0_S$, p+p, Λ+Λbar and at different center-of-mass energies scaled by the values at 62.4 GeV. The grey and yellow bands represent systematic uncertainties in the v2 ratios arising from non-flow effects. The grey bands (above unity) are the uncertainties for the 200 GeV/62.4 GeV data and the yellow bands (below unity) are for the 17.3 GeV/62.4 GeV data.
We present measurements of 2$^{nd}$ order azimuthal anisotropy ($v_{2}$) at mid-rapidity $(|y|<1.0)$ for light nuclei d, t, $^{3}$He (for $\sqrt{s_{NN}}$ = 200, 62.4, 39, 27, 19.6, 11.5, and 7.7 GeV) and anti-nuclei $\bar{\rm d}$ ($\sqrt{s_{NN}}$ = 200, 62.4, 39, 27, and 19.6 GeV) and $^{3}\bar{\rm He}$ ($\sqrt{s_{NN}}$ = 200 GeV) in the STAR (Solenoidal Tracker at RHIC) experiment. The $v_{2}$ for these light nuclei produced in heavy-ion collisions is compared with those for p and $\bar{\rm p}$. We observe mass ordering in nuclei $v_{2}(p_{T})$ at low transverse momenta ($p_{T}<2.0$ GeV/$c$). We also find a centrality dependence of $v_{2}$ for d and $\bar{\rm d}$. The magnitude of $v_{2}$ for t and $^{3}$He agree within statistical errors. Light-nuclei $v_{2}$ are compared with predictions from a blast wave model. Atomic mass number ($A$) scaling of light-nuclei $v_{2}(p_{T})$ seems to hold for $p_{T}/A < 1.5$ GeV/$c$. Results on light-nuclei $v_{2}$ from a transport-plus-coalescence model are consistent with the experimental measurements.
Identified charged pion, kaon, and proton spectra are used to explore the system size dependence of bulk freeze-out properties in Cu+Cu collisions at $\sqrt{s_{NN}}$=200 and 62.4 GeV. The data are studied with hydrodynamically-motivated Blast-wave and statistical model frameworks in order to characterize the freeze-out properties of the system. The dependence of freeze-out parameters on beam energy and collision centrality is discussed. Using the existing results from Au+Au and $pp$ collisions, the dependence of freeze-out parameters on the system size is also explored. This multi-dimensional systematic study furthers our understanding of the QCD phase diagram revealing the importance of the initial geometrical overlap of the colliding ions. The analysis of Cu+Cu collisions, which expands the system size dependence studies from Au+Au data with detailed measurements in the smaller system, shows that the bulk freeze-out properties of charged particles studied here scale with the total charged particle multiplicity at mid-rapidity, suggesting the relevance of initial state effects.
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