Showing 10 of 21 results
We present results from a harmonic decomposition of two-particle azimuthal correlations measured with the STAR detector in Au+Au collisions for energies ranging from $\sqrt{s_{NN}}=7.7$ GeV to 200 GeV. The third harmonic $v_3^2\{2\}=\langle \cos3(\phi_1-\phi_2)\rangle$, where $\phi_1-\phi_2$ is the angular difference in azimuth, is studied as a function of the pseudorapidity difference between particle pairs $\Delta\eta = \eta_1-\eta_2$. Non-zero {\vthree} is directly related to the previously observed large-$\Delta\eta$ narrow-$\Delta\phi$ ridge correlations and has been shown in models to be sensitive to the existence of a low viscosity Quark Gluon Plasma (QGP) phase. For sufficiently central collisions, $v_3^2\{2\}$ persist down to an energy of 7.7 GeV suggesting that QGP may be created even in these low energy collisions. In peripheral collisions at these low energies however, $v_3^2\{2\}$ is consistent with zero. When scaled by pseudorapidity density of charged particle multiplicity per participating nucleon pair, $v_3^2\{2\}$ for central collisions shows a minimum near {\snn}$=20$ GeV.
Representative results on $v_3^2\{2\}$ from Au+Au collisions as a function of $\Delta\eta$ for charged hadrons with pT > 0.2 GeV/c and |$\eta$| < 1.
Representative results on $v_3^2\{2\}$ from Au+Au collisions as a function of $\Delta\eta$ for charged hadrons with pT > 0.2 GeV/c and |$\eta$| < 1.
Representative results on $v_3^2\{2\}$ from Au+Au collisions as a function of $\Delta\eta$ for charged hadrons with pT > 0.2 GeV/c and |$\eta$| < 1.
Representative results on $v_3^2\{2\}$ from Au+Au collisions as a function of $\Delta\eta$ for charged hadrons with pT > 0.2 GeV/c and |$\eta$| < 1.
Representative results on $v_3^2\{2\}$ from Au+Au collisions as a function of $\Delta\eta$ for charged hadrons with pT > 0.2 GeV/c and |$\eta$| < 1.
Representative results on $v_3^2\{2\}$ from Au+Au collisions as a function of $\Delta\eta$ for charged hadrons with pT > 0.2 GeV/c and |$\eta$| < 1.
Representative results on $v_3^2\{2\}$ from Au+Au collisions as a function of $\Delta\eta$ for charged hadrons with pT > 0.2 GeV/c and |$\eta$| < 1.
Representative results on $v_3^2\{2\}$ from Au+Au collisions as a function of $\Delta\eta$ for charged hadrons with pT > 0.2 GeV/c and |$\eta$| < 1.
Representative results on $v_3^2\{2\}$ from Au+Au collisions as a function of $\Delta\eta$ for charged hadrons with pT > 0.2 GeV/c and |$\eta$| < 1.
Representative results on $v_3^2\{2\}$ from Au+Au collisions as a function of $\Delta\eta$ for charged hadrons with pT > 0.2 GeV/c and |$\eta$| < 1.
Representative results on $v_3^2\{2\}$ from Au+Au collisions as a function of $\Delta\eta$ for charged hadrons with pT > 0.2 GeV/c and |$\eta$| < 1.
Representative results on $v_3^2\{2\}$ from Au+Au collisions as a function of $\Delta\eta$ for charged hadrons with pT > 0.2 GeV/c and |$\eta$| < 1.
Representative results on $v_3^2\{2\}$ from Au+Au collisions as a function of $\Delta\eta$ for charged hadrons with pT > 0.2 GeV/c and |$\eta$| < 1.
Representative results on $v_3^2\{2\}$ from Au+Au collisions as a function of $\Delta\eta$ for charged hadrons with pT > 0.2 GeV/c and |$\eta$| < 1.
Representative results on $v_3^2\{2\}$ from Au+Au collisions as a function of $\Delta\eta$ for charged hadrons with pT > 0.2 GeV/c and |$\eta$| < 1.
Representative results on $v_3^2\{2\}$ from Au+Au collisions as a function of $\Delta\eta$ for charged hadrons with pT > 0.2 GeV/c and |$\eta$| < 1.
Representative results on $v_3^2\{2\}$ from Au+Au collisions as a function of $\Delta\eta$ for charged hadrons with pT > 0.2 GeV/c and |$\eta$| < 1.
Representative results on $v_3^2\{2\}$ from Au+Au collisions as a function of $\Delta\eta$ for charged hadrons with pT > 0.2 GeV/c and |$\eta$| < 1.
Representative results on $v_3^2\{2\}$ from Au+Au collisions as a function of $\Delta\eta$ for charged hadrons with pT > 0.2 GeV/c and |$\eta$| < 1.
Representative results on $v_3^2\{2\}$ from Au+Au collisions as a function of $\Delta\eta$ for charged hadrons with pT > 0.2 GeV/c and |$\eta$| < 1.
Representative results on $v_3^2\{2\}$ from Au+Au collisions as a function of $\Delta\eta$ for charged hadrons with pT > 0.2 GeV/c and |$\eta$| < 1.
Representative results on $v_3^2\{2\}$ from Au+Au collisions as a function of $\Delta\eta$ for charged hadrons with pT > 0.2 GeV/c and |$\eta$| < 1.
Representative results on $v_3^2\{2\}$ from Au+Au collisions as a function of $\Delta\eta$ for charged hadrons with pT > 0.2 GeV/c and |$\eta$| < 1.
Representative results on $v_3^2\{2\}$ from Au+Au collisions as a function of $\Delta\eta$ for charged hadrons with pT > 0.2 GeV/c and |$\eta$| < 1.
Representative results on $v_3^2\{2\}$ from Au+Au collisions as a function of $\Delta\eta$ for charged hadrons with pT > 0.2 GeV/c and |$\eta$| < 1.
Representative results on $v_3^2\{2\}$ from Au+Au collisions as a function of $\Delta\eta$ for charged hadrons with pT > 0.2 GeV/c and |$\eta$| < 1.
Representative results on $v_3^2\{2\}$ from Au+Au collisions as a function of $\Delta\eta$ for charged hadrons with pT > 0.2 GeV/c and |$\eta$| < 1.
Representative results on $v_3^2\{2\}$ from Au+Au collisions as a function of $\Delta\eta$ for charged hadrons with pT > 0.2 GeV/c and |$\eta$| < 1.
Representative results on $v_3^2\{2\}$ from Au+Au collisions as a function of $\Delta\eta$ for charged hadrons with pT > 0.2 GeV/c and |$\eta$| < 1.
Representative results on $v_3^2\{2\}$ from Au+Au collisions as a function of $\Delta\eta$ for charged hadrons with pT > 0.2 GeV/c and |$\eta$| < 1.
Representative results on $v_3^2\{2\}$ from Au+Au collisions as a function of $\Delta\eta$ for charged hadrons with pT > 0.2 GeV/c and |$\eta$| < 1.
Representative results on $v_3^2\{2\}$ from Au+Au collisions as a function of $\Delta\eta$ for charged hadrons with pT > 0.2 GeV/c and |$\eta$| < 1.
Representative results on $v_3^2\{2\}$ from Au+Au collisions as a function of $\Delta\eta$ for charged hadrons with pT > 0.2 GeV/c and |$\eta$| < 1.
Representative results on $v_3^2\{2\}$ from Au+Au collisions as a function of $\Delta\eta$ for charged hadrons with pT > 0.2 GeV/c and |$\eta$| < 1.
Representative results on $v_3^2\{2\}$ from Au+Au collisions as a function of $\Delta\eta$ for charged hadrons with pT > 0.2 GeV/c and |$\eta$| < 1.
Representative results on $v_3^2\{2\}$ from Au+Au collisions as a function of $\Delta\eta$ for charged hadrons with pT > 0.2 GeV/c and |$\eta$| < 1.
Representative results on $v_3^2\{2\}$ from Au+Au collisions as a function of $\Delta\eta$ for charged hadrons with pT > 0.2 GeV/c and |$\eta$| < 1.
Representative results on $v_3^2\{2\}$ from Au+Au collisions as a function of $\Delta\eta$ for charged hadrons with pT > 0.2 GeV/c and |$\eta$| < 1.
Representative results on $v_3^2\{2\}$ from Au+Au collisions as a function of $\Delta\eta$ for charged hadrons with pT > 0.2 GeV/c and |$\eta$| < 1.
Representative results on $v_3^2\{2\}$ from Au+Au collisions as a function of $\Delta\eta$ for charged hadrons with pT > 0.2 GeV/c and |$\eta$| < 1.
Representative results on $v_3^2\{2\}$ from Au+Au collisions as a function of $\Delta\eta$ for charged hadrons with pT > 0.2 GeV/c and |$\eta$| < 1.
Representative results on $v_3^2\{2\}$ from Au+Au collisions as a function of $\Delta\eta$ for charged hadrons with pT > 0.2 GeV/c and |$\eta$| < 1.
Representative results on $v_3^2\{2\}$ from Au+Au collisions as a function of $\Delta\eta$ for charged hadrons with pT > 0.2 GeV/c and |$\eta$| < 1.
Representative results on $v_3^2\{2\}$ from Au+Au collisions as a function of $\Delta\eta$ for charged hadrons with pT > 0.2 GeV/c and |$\eta$| < 1.
Representative results on $v_3^2\{2\}$ from Au+Au collisions as a function of $\Delta\eta$ for charged hadrons with pT > 0.2 GeV/c and |$\eta$| < 1.
Representative results on $v_3^2\{2\}$ from Au+Au collisions as a function of $\Delta\eta$ for charged hadrons with pT > 0.2 GeV/c and |$\eta$| < 1.
Representative results on $v_3^2\{2\}$ from Au+Au collisions as a function of $\Delta\eta$ for charged hadrons with pT > 0.2 GeV/c and |$\eta$| < 1.
Representative results on $v_3^2\{2\}$ from Au+Au collisions as a function of $\Delta\eta$ for charged hadrons with pT > 0.2 GeV/c and |$\eta$| < 1.
Representative results on $v_3^2\{2\}$ from Au+Au collisions as a function of $\Delta\eta$ for charged hadrons with pT > 0.2 GeV/c and |$\eta$| < 1.
Representative results on $v_3^2\{2\}$ from Au+Au collisions as a function of $\Delta\eta$ for charged hadrons with pT > 0.2 GeV/c and |$\eta$| < 1.
Representative results on $v_3^2\{2\}$ from Au+Au collisions as a function of $\Delta\eta$ for charged hadrons with pT > 0.2 GeV/c and |$\eta$| < 1.
Representative results on $v_3^2\{2\}$ from Au+Au collisions as a function of $\Delta\eta$ for charged hadrons with pT > 0.2 GeV/c and |$\eta$| < 1.
Representative results on $v_3^2\{2\}$ from Au+Au collisions as a function of $\Delta\eta$ for charged hadrons with pT > 0.2 GeV/c and |$\eta$| < 1.
Representative results on $v_3^2\{2\}$ from Au+Au collisions as a function of $\Delta\eta$ for charged hadrons with pT > 0.2 GeV/c and |$\eta$| < 1.
Representative results on $v_3^2\{2\}$ from Au+Au collisions as a function of $\Delta\eta$ for charged hadrons with pT > 0.2 GeV/c and |$\eta$| < 1.
Representative results on $v_3^2\{2\}$ from Au+Au collisions as a function of $\Delta\eta$ for charged hadrons with pT > 0.2 GeV/c and |$\eta$| < 1.
Representative results on $v_3^2\{2\}$ from Au+Au collisions as a function of $\Delta\eta$ for charged hadrons with pT > 0.2 GeV/c and |$\eta$| < 1.
Representative results on $v_3^2\{2\}$ from Au+Au collisions as a function of $\Delta\eta$ for charged hadrons with pT > 0.2 GeV/c and |$\eta$| < 1.
Representative results on $v_3^2\{2\}$ from Au+Au collisions as a function of $\Delta\eta$ for charged hadrons with pT > 0.2 GeV/c and |$\eta$| < 1.
Representative results on $v_3^2\{2\}$ from Au+Au collisions as a function of $\Delta\eta$ for charged hadrons with pT > 0.2 GeV/c and |$\eta$| < 1.
Representative results on $v_3^2\{2\}$ from Au+Au collisions as a function of $\Delta\eta$ for charged hadrons with pT > 0.2 GeV/c and |$\eta$| < 1.
Representative results on $v_3^2\{2\}$ from Au+Au collisions as a function of $\Delta\eta$ for charged hadrons with pT > 0.2 GeV/c and |$\eta$| < 1.
Representative results on $v_3^2\{2\}$ from Au+Au collisions as a function of $\Delta\eta$ for charged hadrons with pT > 0.2 GeV/c and |$\eta$| < 1.
Representative results on $v_3^2\{2\}$ from Au+Au collisions as a function of $\Delta\eta$ for charged hadrons with pT > 0.2 GeV/c and |$\eta$| < 1.
Representative results on $v_3^2\{2\}$ from Au+Au collisions as a function of $\Delta\eta$ for charged hadrons with pT > 0.2 GeV/c and |$\eta$| < 1.
Representative results on $v_3^2\{2\}$ from Au+Au collisions as a function of $\Delta\eta$ for charged hadrons with pT > 0.2 GeV/c and |$\eta$| < 1.
Representative results on $v_3^2\{2\}$ from Au+Au collisions as a function of $\Delta\eta$ for charged hadrons with pT > 0.2 GeV/c and |$\eta$| < 1.
Representative results on $v_3^2\{2\}$ from Au+Au collisions as a function of $\Delta\eta$ for charged hadrons with pT > 0.2 GeV/c and |$\eta$| < 1.
Representative results on $v_3^2\{2\}$ from Au+Au collisions as a function of $\Delta\eta$ for charged hadrons with pT > 0.2 GeV/c and |$\eta$| < 1.
Representative results on $v_3^2\{2\}$ from Au+Au collisions as a function of $\Delta\eta$ for charged hadrons with pT > 0.2 GeV/c and |$\eta$| < 1.
Representative results on $v_3^2\{2\}$ from Au+Au collisions as a function of $\Delta\eta$ for charged hadrons with pT > 0.2 GeV/c and |$\eta$| < 1.
Representative results on $v_3^2\{2\}$ from Au+Au collisions as a function of $\Delta\eta$ for charged hadrons with pT > 0.2 GeV/c and |$\eta$| < 1.
Npart values are for the corresponding centrality at 200 GeV.
Npart values are for the corresponding centrality at 200 GeV.
Npart values are for the corresponding centrality at 200 GeV.
Npart values are for the corresponding centrality at 200 GeV.
Npart values are for the corresponding centrality at 200 GeV.
Npart values are for the corresponding centrality at 200 GeV.
Npart values are for the corresponding centrality at 200 GeV.
Npart values are for the corresponding centrality at 200 GeV.
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We present measurements of $\Omega$ and $\phi$ production at mid-rapidity from Au+Au collisions at nucleon-nucleon center-of-mass energies $\sqrt{s_{NN}}$ = 7.7, 11.5, 19.6, 27 and 39 GeV by the STAR experiment at the Relativistic Heavy Ion Collider (RHIC). Motivated by the coalescence formation mechanism for these strange hadrons, we study the ratios of $N(\Omega^{-}+\Omega^{+})/(2N(\phi))$. These ratios as a function of transverse momentum ($p_T$) fall on a consistent trend at high collision energies, but start to show deviations in peripheral collisions at $\sqrt{s_{NN}}$ = 19.6, 27 and 39 GeV, and in central collisions at 11.5 GeV in the intermediate $p_T$ region of 2.4-3.6 GeV/c. We further evaluate empirically the strange quark $p_T$ distributions at hadronization by studying the $\Omega/\phi$ ratios scaled by the number of constituent quarks. The NCQ-scaled $\Omega/\phi$ ratios show a suppression of strange quark production in central collisions at 11.5 GeV compared to $\sqrt{s_{NN}} >= 19.6$ GeV. The shapes of the presumably thermal strange quark distributions in 0-60% most central collisions at 7.7 GeV show significant deviations from those in 0-10% most central collisions at higher energies. These features suggest that there is likely a change of the underlying strange quark dynamics in the transition from quark-matter to hadronic matter at collision energies below 19.6 GeV.
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ks(pTs) = N(Omega+Anti-Omega)_(pT=3pTs)/2N(phi)_(pT=2pTs) N is the invariant yield.
ks(pTs) = N(Omega+Anti-Omega)_(pT=3pTs)/2N(phi)_(pT=2pTs) N is the invariant yield.
ks(pTs) = N(Omega+Anti-Omega)_(pT=3pTs)/2N(phi)_(pT=2pTs) N is the invariant yield.
ks(pTs) = N(Omega+Anti-Omega)_(pT=3pTs)/2N(phi)_(pT=2pTs) N is the invariant yield.
ks(pTs) = N(Omega+Anti-Omega)_(pT=3pTs)/2N(phi)_(pT=2pTs) N is the invariant yield.
ks(pTs) = N(Omega+Anti-Omega)_(pT=3pTs)/2N(phi)_(pT=2pTs) N is the invariant yield.
We present measurements of bulk properties of the matter produced in Au+Au collisions at $\sqrt{s_{NN}}=$ 7.7, 11.5, 19.6, 27, and 39 GeV using identified hadrons ($\pi^\pm$, $K^\pm$, $p$ and $\bar{p}$) from the STAR experiment in the Beam Energy Scan (BES) Program at the Relativistic Heavy Ion Collider (RHIC). Midrapidity ($|y|<$0.1) results for multiplicity densities $dN/dy$, average transverse momenta $\langle p_T \rangle$ and particle ratios are presented. The chemical and kinetic freeze-out dynamics at these energies are discussed and presented as a function of collision centrality and energy. These results constitute the systematic measurements of bulk properties of matter formed in heavy-ion collisions over a broad range of energy (or baryon chemical potential) at RHIC.
The average number of participating nucleons (⟨Npart⟩) for various collision centralities in Au+Au collisions at √sNN = 7.7–39 GeV.
Midrapidity (|y| < 0.1) transverse momentum spectra for (b) π- in Au+Au collisions at √sNN = 7.7 GeV for different centralities. The spectra for centralities other than 0–5% are scaled for clarity as shown in the figure. The curves represent the Bose-Einstein, mT -exponential, and double-exponential function fits to 0–5% central data for pions, kaons, and (anti)protons, respectively. The uncertainties are statistical and systematic added in quadrature.
Midrapidity (|y| < 0.1) transverse momentum spectra for (a) π+ in Au+Au collisions at √sNN = 7.7 GeV for different centralities. The spectra for centralities other than 0–5% are scaled for clarity as shown in the figure. The curves represent the Bose-Einstein, mT -exponential, and double-exponential function fits to 0–5% central data for pions, kaons, and (anti)protons, respectively. The uncertainties are statistical and systematic added in quadrature.
Midrapidity (|y| < 0.1) transverse momentum spectra for (d) K− in Au+Au collisions at √sNN = 7.7 GeV for different centralities. The spectra for centralities other than 0–5% are scaled for clarity as shown in the figure. The curves represent the Bose-Einstein, mT -exponential, and double-exponential function fits to 0–5% central data for pions, kaons, and (anti)protons, respectively. The uncertainties are statistical and systematic added in quadrature.
Midrapidity (|y| < 0.1) transverse momentum spectra for (c) K+ in Au+Au collisions at √sNN = 7.7 GeV for different centralities. The spectra for centralities other than 0–5% are scaled for clarity as shown in the figure. The curves represent the Bose-Einstein, mT -exponential, and double-exponential function fits to 0–5% central data for pions, kaons, and (anti)protons, respectively. The uncertainties are statistical and systematic added in quadrature.
Midrapidity (|y| < 0.1) transverse momentum spectra for (f) p¯ in Au+Au collisions at √sNN = 7.7 GeV for different centralities. The spectra for centralities other than 0–5% are scaled for clarity as shown in the figure. The curves represent the Bose-Einstein, mT -exponential, and double-exponential function fits to 0–5% central data for pions, kaons, and (anti)protons, respectively. The uncertainties are statistical and systematic added in quadrature.
Midrapidity (|y| < 0.1) transverse momentum spectra for (e) p in Au+Au collisions at √sNN = 7.7 GeV for different centralities. The spectra for centralities other than 0–5% are scaled for clarity as shown in the figure. The curves represent the Bose-Einstein, mT -exponential, and double-exponential function fits to 0–5% central data for pions, kaons, and (anti)protons, respectively. The uncertainties are statistical and systematic added in quadrature.
Midrapidity (|y| < 0.1) transverse momentum spectra for (b) π− in Au+Au collisions at √sNN = 11.5 GeV for different centralities. The spectra for centralities other than 0–5% are scaled for clarity as shown in the figure. The curves represent the Bose-Einstein, mT -exponential, and double-exponential function fits to 0–5% central data for pions, kaons, and (anti)protons, respectively. The uncertainties are statistical and systematic added in quadrature.
Midrapidity (|y| < 0.1) transverse momentum spectra for (a) π+ in Au+Au collisions at √sNN = 11.5 GeV for different centralities. The spectra for centralities other than 0–5% are scaled for clarity as shown in the figure. The curves represent the Bose-Einstein, mT -exponential, and double-exponential function fits to 0–5% central data for pions, kaons, and (anti)protons, respectively. The uncertainties are statistical and systematic added in quadrature.
Midrapidity (|y| < 0.1) transverse momentum spectra for (d) K− in Au+Au collisions at √sNN = 11.5 GeV for different centralities. The spectra for centralities other than 0–5% are scaled for clarity as shown in the figure. The curves represent the Bose-Einstein, mT -exponential, and double-exponential function fits to 0–5% central data for pions, kaons, and (anti)protons, respectively. The uncertainties are statistical and systematic added in quadrature.
Midrapidity (|y| < 0.1) transverse momentum spectra for (c) K+ in Au+Au collisions at √sNN = 11.5 GeV for different centralities. The spectra for centralities other than 0–5% are scaled for clarity as shown in the figure. The curves represent the Bose-Einstein, mT -exponential, and double-exponential function fits to 0–5% central data for pions, kaons, and (anti)protons, respectively. The uncertainties are statistical and systematic added in quadrature.
Midrapidity (|y| < 0.1) transverse momentum spectra for (f) p¯ in Au+Au collisions at √sNN = 11.5 GeV for different centralities. The spectra for centralities other than 0–5% are scaled for clarity as shown in the figure. The curves represent the Bose-Einstein, mT -exponential, and double-exponential function fits to 0–5% central data for pions, kaons, and (anti)protons, respectively. The uncertainties are statistical and systematic added in quadrature.
Midrapidity (|y| < 0.1) transverse momentum spectra for (e) p in Au+Au collisions at √sNN = 11.5 GeV for different centralities. The spectra for centralities other than 0–5% are scaled for clarity as shown in the figure. The curves represent the Bose-Einstein, mT -exponential, and double-exponential function fits to 0–5% central data for pions, kaons, and (anti)protons, respectively. The uncertainties are statistical and systematic added in quadrature.
Midrapidity (|y| < 0.1) transverse momentum spectra for (b) π− in Au+Au collisions at √sNN = 19.6 GeV for different centralities. The spectra for centralities other than 0–5% are scaled for clarity as shown in the figure. The curves represent the Bose-Einstein, mT -exponential, and double-exponential function fits to 0–5% central data for pions, kaons, and (anti)protons, respectively. The uncertainties are statistical and systematic added in quadrature.
Midrapidity (|y| < 0.1) transverse momentum spectra for (a) π+ in Au+Au collisions at √sNN = 19.6 GeV for different centralities. The spectra for centralities other than 0–5% are scaled for clarity as shown in the figure. The curves represent the Bose-Einstein, mT -exponential, and double-exponential function fits to 0–5% central data for pions, kaons, and (anti)protons, respectively. The uncertainties are statistical and systematic added in quadrature.
Midrapidity (|y| < 0.1) transverse momentum spectra for (d) K− in Au+Au collisions at √sNN = 19.6 GeV for different centralities. The spectra for centralities other than 0–5% are scaled for clarity as shown in the figure. The curves represent the Bose-Einstein, mT -exponential, and double-exponential function fits to 0–5% central data for pions, kaons, and (anti)protons, respectively. The uncertainties are statistical and systematic added in quadrature.
Midrapidity (|y| < 0.1) transverse momentum spectra for (c) K+ in Au+Au collisions at √sNN = 19.6 GeV for different centralities. The spectra for centralities other than 0–5% are scaled for clarity as shown in the figure. The curves represent the Bose-Einstein, mT -exponential, and double-exponential function fits to 0–5% central data for pions, kaons, and (anti)protons, respectively. The uncertainties are statistical and systematic added in quadrature.
Midrapidity (|y| < 0.1) transverse momentum spectra for (f) p¯ in Au+Au collisions at √sNN = 19.6 GeV for different centralities. The spectra for centralities other than 0–5% are scaled for clarity as shown in the figure. The curves represent the Bose-Einstein, mT -exponential, and double-exponential function fits to 0–5% central data for pions, kaons, and (anti)protons, respectively. The uncertainties are statistical and systematic added in quadrature.
Midrapidity (|y| < 0.1) transverse momentum spectra for (e) p in Au+Au collisions at √sNN = 19.6 GeV for different centralities. The spectra for centralities other than 0–5% are scaled for clarity as shown in the figure. The curves represent the Bose-Einstein, mT -exponential, and double-exponential function fits to 0–5% central data for pions, kaons, and (anti)protons, respectively. The uncertainties are statistical and systematic added in quadrature.
Midrapidity (|y| < 0.1) transverse momentum spectra for (b) π− in Au+Au collisions at √sNN = 27 GeV for different centralities. The spectra for centralities other than 0–5% are scaled for clarity as shown in the figure. The curves represent the Bose-Einstein, mT -exponential, and double-exponential function fits to 0–5% central data for pions, kaons, and (anti)protons, respectively. The uncertainties are statistical and systematic added in quadrature.
Midrapidity (|y| < 0.1) transverse momentum spectra for (a) π+ in Au+Au collisions at √sNN = 27 GeV for different centralities. The spectra for centralities other than 0–5% are scaled for clarity as shown in the figure. The curves represent the Bose-Einstein, mT -exponential, and double-exponential function fits to 0–5% central data for pions, kaons, and (anti)protons, respectively. The uncertainties are statistical and systematic added in quadrature.
Midrapidity (|y| < 0.1) transverse momentum spectra for (d) K− in Au+Au collisions at √sNN = 27 GeV for different centralities. The spectra for centralities other than 0–5% are scaled for clarity as shown in the figure. The curves represent the Bose-Einstein, mT -exponential, and double-exponential function fits to 0–5% central data for pions, kaons, and (anti)protons, respectively. The uncertainties are statistical and systematic added in quadrature.
Midrapidity (|y| < 0.1) transverse momentum spectra for (c) K+ in Au+Au collisions at √sNN = 27 GeV for different centralities. The spectra for centralities other than 0–5% are scaled for clarity as shown in the figure. The curves represent the Bose-Einstein, mT -exponential, and double-exponential function fits to 0–5% central data for pions, kaons, and (anti)protons, respectively. The uncertainties are statistical and systematic added in quadrature.
Midrapidity (|y| < 0.1) transverse momentum spectra for (f) p¯ in Au+Au collisions at √sNN = 27 GeV for different centralities. The spectra for centralities other than 0–5% are scaled for clarity as shown in the figure. The curves represent the Bose-Einstein, mT -exponential, and double-exponential function fits to 0–5% central data for pions, kaons, and (anti)protons, respectively. The uncertainties are statistical and systematic added in quadrature.
Midrapidity (|y| < 0.1) transverse momentum spectra for (e) p in Au+Au collisions at √sNN = 27 GeV for different centralities. The spectra for centralities other than 0–5% are scaled for clarity as shown in the figure. The curves represent the Bose-Einstein, mT -exponential, and double-exponential function fits to 0–5% central data for pions, kaons, and (anti)protons, respectively. The uncertainties are statistical and systematic added in quadrature.
Midrapidity (|y| < 0.1) transverse momentum spectra for (b) π− in Au+Au collisions at √sNN = 39 GeV for different centralities. The spectra for centralities other than 0–5% are scaled for clarity as shown in the figure. The curves represent the Bose-Einstein, mT -exponential, and double-exponential function fits to 0–5% central data for pions, kaons, and (anti)protons, respectively. The uncertainties are statistical and systematic added in quadrature.
Midrapidity (|y| < 0.1) transverse momentum spectra for (a) π+ in Au+Au collisions at √sNN = 39 GeV for different centralities. The spectra for centralities other than 0–5% are scaled for clarity as shown in the figure. The curves represent the Bose-Einstein, mT -exponential, and double-exponential function fits to 0–5% central data for pions, kaons, and (anti)protons, respectively. The uncertainties are statistical and systematic added in quadrature.
Midrapidity (|y| < 0.1) transverse momentum spectra for (d) k- in Au+Au collisions at √sNN = 39 GeV for different centralities. The spectra for centralities other than 0–5% are scaled for clarity as shown in the figure. The curves represent the Bose-Einstein, mT -exponential, and double-exponential function fits to 0–5% central data for pions, kaons, and (anti)protons, respectively. The uncertainties are statistical and systematic added in quadrature.
Midrapidity (|y| < 0.1) transverse momentum spectra for (c) k+ in Au+Au collisions at √sNN = 39 GeV for different centralities. The spectra for centralities other than 0–5% are scaled for clarity as shown in the figure. The curves represent the Bose-Einstein, mT -exponential, and double-exponential function fits to 0–5% central data for pions, kaons, and (anti)protons, respectively. The uncertainties are statistical and systematic added in quadrature.
Midrapidity (|y| < 0.1) transverse momentum spectra for (f) pbar in Au+Au collisions at √sNN = 39 GeV for different centralities. The spectra for centralities other than 0–5% are scaled for clarity as shown in the figure. The curves represent the Bose-Einstein, mT -exponential, and double-exponential function fits to 0–5% central data for pions, kaons, and (anti)protons, respectively. The uncertainties are statistical and systematic added in quadrature.
Midrapidity (|y| < 0.1) transverse momentum spectra for (e) p in Au+Au collisions at √sNN = 39 GeV for different centralities. The spectra for centralities other than 0–5% are scaled for clarity as shown in the figure. The curves represent the Bose-Einstein, mT -exponential, and double-exponential function fits to 0–5% central data for pions, kaons, and (anti)protons, respectively. The uncertainties are statistical and systematic added in quadrature.
Centrality dependence of dN/dy normalized by ⟨Npart⟩/2 for π+, π−, K+, K−, p, and p ̄ at midrapidity (|y|<0.1) in Au+Au collisions at √sNN = 7.7 GeV. Errors shown are the quadrature sum of statistical and systematic uncertainties. For clarity, ⟨Npart⟩ uncertainties are not added in quadrature.
Centrality dependence of dN/dy normalized by ⟨Npart⟩/2 for π+, π−, K+, K−, p, and p ̄ at midrapidity (|y|<0.1) in Au+Au collisions at √sNN = 11.5 GeV. Errors shown are the quadrature sum of statistical and systematic uncertainties. For clarity, ⟨Npart⟩ uncertainties are not added in quadrature.
Centrality dependence of dN/dy normalized by ⟨Npart⟩/2 for π+, π−, K+, K−, p, and p ̄ at midrapidity (|y|<0.1) in Au+Au collisions at √sNN = 19.6 GeV. Errors shown are the quadrature sum of statistical and systematic uncertainties. For clarity, ⟨Npart⟩ uncertainties are not added in quadrature.
Centrality dependence of dN/dy normalized by ⟨Npart⟩/2 for π+, π−, K+, K−, p, and p ̄ at midrapidity (|y|<0.1) in Au+Au collisions at √sNN = 27 GeV. Errors shown are the quadrature sum of statistical and systematic uncertainties. For clarity, ⟨Npart⟩ uncertainties are not added in quadrature.
Centrality dependence of dN/dy normalized by ⟨Npart⟩/2 for π+, π−, K+, K−, p, and p ̄ at midrapidity (|y|<0.1) in Au+Au collisions at √sNN = 39 GeV. Errors shown are the quadrature sum of statistical and systematic uncertainties. For clarity, ⟨Npart⟩ uncertainties are not added in quadrature.
Centrality dependences of <pT> for π+, π−, K+, K−, p, and p ̄ at midrapidity (|y|<0.1) in Au+Au collisions at √sNN = 7.7 GeV. Errors shown are quadrature sum of statistical and systematic uncertainties where the latter dominates.
Centrality dependences of <pT> for π+, π−, K+, K−, p, and p ̄ at midrapidity (|y|<0.1) in Au+Au collisions at √sNN = 11.5 GeV. Errors shown are quadrature sum of statistical and systematic uncertainties where the latter dominates.
Centrality dependences of <pT> for π+, π−, K+, K−, p, and p ̄ at midrapidity (|y|<0.1) in Au+Au collisions at √sNN = 19.6 GeV. Errors shown are quadrature sum of statistical and systematic uncertainties where the latter dominates.
Centrality dependences of <pT> for π+, π−, K+, K−, p, and p ̄ at midrapidity (|y|<0.1) in Au+Au collisions at √sNN = 27 GeV. Errors shown are quadrature sum of statistical and systematic uncertainties where the latter dominates.
Centrality dependences of <pT> for π+, π−, K+, K−, p, and p ̄ at midrapidity (|y|<0.1) in Au+Au collisions at √sNN = 39 GeV. Errors shown are quadrature sum of statistical and systematic uncertainties where the latter dominates.
Variation of π−/π+, K−/K+, and p ̄/p ratios as a function of ⟨Npart⟩ at midrapidity (|y| < 0.1) in Au+Au collisions at 7.7 GeV. Errors shown are the quadrature sum of statistical and systematic uncertainties where the latter dominates.
Variation of π−/π+, K−/K+, and p ̄/p ratios as a function of ⟨Npart⟩ at midrapidity (|y| < 0.1) in Au+Au collisions at 11.5 GeV. Errors shown are the quadrature sum of statistical and systematic uncertainties where the latter dominates.
Variation of π−/π+, K−/K+, and p ̄/p ratios as a function of ⟨Npart⟩ at midrapidity (|y| < 0.1) in Au+Au collisions at 19.6 GeV. Errors shown are the quadrature sum of statistical and systematic uncertainties where the latter dominates.
Variation of π−/π+, K−/K+, and p ̄/p ratios as a function of ⟨Npart⟩ at midrapidity (|y| < 0.1) in Au+Au collisions at 27 GeV. Errors shown are the quadrature sum of statistical and systematic uncertainties where the latter dominates.
Variation of π−/π+, K−/K+, and p ̄/p ratios as a function of ⟨Npart⟩ at midrapidity (|y| < 0.1) in Au+Au collisions at 39 GeV. Errors shown are the quadrature sum of statistical and systematic uncertainties where the latter dominates.
Variation of K−/π−, p ̄/π−, K+/π+, and p/π+ ratios as a function of ⟨Npart⟩ at midrapidity (|y| < 0.1) in Au+Au collisions at 7.7 GeV. Errors shown are the quadrature sum of statistical and systematic uncertainties where the latter dominates.
Variation of K−/π−, p ̄/π−, K+/π+, and p/π+ ratios as a function of ⟨Npart⟩ at midrapidity (|y| < 0.1) in Au+Au collisions at 11.5 GeV. Errors shown are the quadrature sum of statistical and systematic uncertainties where the latter dominates.
Variation of K−/π−, p ̄/π−, K+/π+, and p/π+ ratios as a function of ⟨Npart⟩ at midrapidity (|y| < 0.1) in Au+Au collisions at 19.6 GeV. Errors shown are the quadrature sum of statistical and systematic uncertainties where the latter dominates.
Variation of K−/π−, p ̄/π−, K+/π+, and p/π+ ratios as a function of ⟨Npart⟩ at midrapidity (|y| < 0.1) in Au+Au collisions at 27 GeV. Errors shown are the quadrature sum of statistical and systematic uncertainties where the latter dominates.
Variation of K−/π−, p ̄/π−, K+/π+, and p/π+ ratios as a function of ⟨Npart⟩ at midrapidity (|y| < 0.1) in Au+Au collisions at 39 GeV. Errors shown are the quadrature sum of statistical and systematic uncertainties where the latter dominates.
The midrapidity (|y| < 0.1) dN/dy normalized by ⟨Npart⟩/2 as a function of √sNN for π±, K±, and p and p ̄ in 0–5% Au+Au collisions at BES energies. Errors shown are the quadrature sum of statistical and systematic uncertainties where the latter dominates.
⟨mT⟩ − m of π±, K±, and p and p ̄ as a function of √sNN . Midrapidity (|y| < 0.1) results are shown for 0–5% central Au+Au collisions at BES energies. The errors shown are the quadrature sum of statistical and systematic uncertainties where the latter dominates.
π−/π+, K−/K+, and p ̄/p ratios at midrapidity (|y| < 0.1) in central 0–5% Au+Au collisions at √sNN = 7.7, 11.5, 19.6, 27, and 39 GeV. Errors shown are the quadrature sum of statistical and systematic uncertainties where the latter dominates.
K/π ratio at midrapidity (|y| < 0.1) for central 0–5% Au+Au collisions at √sNN = 7.7, 11.5, 19.6, 27, and 39 GeV. Errors shown are the quadrature sum of statistical and systematic uncertainties where the latter dominates.
The GCE model particle yields fits shown along with standard deviations for Au+Au 7.7 and Au+Au 39 GeV in 0–5% central collisions. Uncertainties on experimental data represent statistical and systematic uncertainties added in quadrature.
The GCE model particle ratios fits shown along with standard deviations for Au+Au 7.7 and Au+Au 39 GeV in 0–5% central collisions. Uncertainties on experimental data represent statistical and systematic uncertainties added in quadrature.
The SCE model particle yields fits shown along with standard deviations for Au+Au 7.7 and Au+Au 39 GeV in 0–5% central collisions. Uncertainties on experimental data represent statistical and systematic uncertainties added in quadrature.
The SCE model particle ratios fits shown along with standard deviations for Au+Au 7.7 and Au+Au 39 GeV in 0–5% central collisions. Uncertainties on experimental data represent statistical and systematic uncertainties added in quadrature.
Chemical freeze-out parameter γS plotted vs ⟨Npart⟩ in GCE for particle yields fit. Uncertainties represent systematic errors.
Chemical freeze-out parameter μB plotted vs ⟨Npart⟩ in GCE for particle yields fit. Uncertainties represent systematic errors.
Chemical freeze-out parameter μS plotted vs ⟨Npart⟩ in GCE for particle yields fit. Uncertainties represent systematic errors.
Chemical freeze-out parameter Tch plotted vs ⟨Npart⟩ in GCE for particle yields fit. Uncertainties represent systematic errors.
Chemical freeze-out parameter R plotted vs ⟨Npart⟩ in GCE for particle yields fit. Uncertainties represent systematic errors.
Ratio of chemical freeze-out parameter γS between results from particle yield fits to particle ratio fits in GCE plotted vs ⟨Npart⟩. Uncertainties represent systematic errors.
Ratio of chemical freeze-out parameter μB between results from particle yield fits to particle ratio fits in GCE plotted vs ⟨Npart⟩. Uncertainties represent systematic errors.
Ratio of chemical freeze-out parameter μS between results from particle yield fits to particle ratio fits in GCE plotted vs ⟨Npart⟩. Uncertainties represent systematic errors.
Ratio of chemical freeze-out parameter Tch between results from particle yield fits to particle ratio fits in GCE plotted vs ⟨Npart⟩. Uncertainties represent systematic errors.
Chemical freeze-out parameter γS plotted vs ⟨Npart⟩ in SCE for particle yields fit. Uncertainties represent systematic errors.
Chemical freeze-out parameter μB plotted vs ⟨Npart⟩ in SCE for particle yields fit. Uncertainties represent systematic errors.
Chemical freeze-out parameter Tch plotted vs ⟨Npart⟩ in SCE for particle yields fit. Uncertainties represent systematic errors.
Chemical freeze-out parameter R plotted vs ⟨Npart⟩ in SCE for particle yields fit. Uncertainties represent systematic errors.
Ratio of chemical freeze-out parameter γS between yield and ratio fits in SCE plotted vs ⟨Npart⟩. Uncertainties represent systematic errors.
Ratio of chemical freeze-out parameter μB between yield and ratio fits in SCE plotted vs ⟨Npart⟩. Uncertainties represent systematic errors.
Ratio of chemical freeze-out parameter Tch between yield and ratio fits in SCE plotted vs ⟨Npart⟩. Uncertainties represent systematic errors.
Ratio of chemical freeze-out parameter γS between GCE and SCE results using particle ratios in fits plotted vs ⟨Npart⟩. Uncertainties represent systematic errors.
Ratio of chemical freeze-out parameter μB between GCE and SCE results using particle ratios in fits plotted vs ⟨Npart⟩. Uncertainties represent systematic errors.
Ratio of chemical freeze-out parameter Tch between GCE and SCE results using particle ratios in fits plotted vs ⟨Npart⟩. Uncertainties represent systematic errors.
Ratio of chemical freeze-out parameter γS between GCE and SCE results using particle yields in fits plotted vs ⟨Npart⟩. Uncertainties represent systematic errors.
Ratio of chemical freeze-out parameter μB between GCE and SCE results using particle yields in fits plotted vs ⟨Npart⟩. Uncertainties represent systematic errors.
Ratio of chemical freeze-out parameter Tch between GCE and SCE results using particle yields in fits plotted vs ⟨Npart⟩. Uncertainties represent systematic errors.
Ratio of chemical freeze-out parameter R between GCE and SCE results using particle yields in fits plotted vs ⟨Npart⟩. Uncertainties represent systematic errors.
Extracted chemical freeze-out temperature vs baryon chemical potential for (a) GCE and (b) SCE cases using particle yields as input for fitting. Curves represent two model predictions [81,82]. The gray bands represent the theoretical prediction ranges of the Cleymans et al. model [81]. Uncertainties represent systematic errors.
Extracted chemical freeze-out temperature vs baryon chemical potential for (a) GCE and (b) SCE cases using particle yields as input for fitting. Curves represent two model predictions [81,82]. The gray bands represent the theoretical prediction ranges of the Cleymans et al. model [81]. Uncertainties represent systematic errors.
Extracted chemical freeze-out temperature vs baryon chemical potential for (a) GCE and (b) SCE cases using particle yields as input for fitting. Curves represent two model predictions [81,82]. The gray bands represent the theoretical prediction ranges of the Cleymans et al. model [81]. Uncertainties represent systematic errors.
"Choice on constraints: Extracted chemical freeze-out temperatures shown in panels (a), (c), and (e) and baryon chemical potentials shown in panels (b), (d), and (f) for GCE using particle yields as input for fitting, respectively, for Au+Au collisions at √sNN = 7.7, 19.6, and 39 GeV. Results are compared for three initial conditions: μQ = 0, μQ constrained to B/2Q value, and μQ constrained to B/2Q along with μS constrained to 0. Uncertainties represent systematic errors."
"Choice on constraints: Extracted chemical freeze-out temperatures shown in panels (a), (c), and (e) and baryon chemical potentials shown in panels (b), (d), and (f) for GCE using particle yields as input for fitting, respectively, for Au+Au collisions at √sNN = 7.7, 19.6, and 39 GeV. Results are compared for three initial conditions: μQ = 0, μQ constrained to B/2Q value, and μQ constrained to B/2Q along with μS constrained to 0. Uncertainties represent systematic errors."
"Choice on constraints: Extracted chemical freeze-out temperatures shown in panels (a), (c), and (e) and baryon chemical potentials shown in panels (b), (d), and (f) for GCE using particle yields as input for fitting, respectively, for Au+Au collisions at √sNN = 7.7, 19.6, and 39 GeV. Results are compared for three initial conditions: μQ = 0, μQ constrained to B/2Q value, and μQ constrained to B/2Q along with μS constrained to 0. Uncertainties represent systematic errors."
"Choice on constraints: Extracted chemical freeze-out temperatures shown in panels (a), (c), and (e) and baryon chemical potentials shown in panels (b), (d), and (f) for GCE using particle yields as input for fitting, respectively, for Au+Au collisions at √sNN = 7.7, 19.6, and 39 GeV. Results are compared for three initial conditions: μQ = 0, μQ constrained to B/2Q value, and μQ constrained to B/2Q along with μS constrained to 0. Uncertainties represent systematic errors."
"Choice on constraints: Extracted chemical freeze-out temperatures shown in panels (a), (c), and (e) and baryon chemical potentials shown in panels (b), (d), and (f) for GCE using particle yields as input for fitting, respectively, for Au+Au collisions at √sNN = 7.7, 19.6, and 39 GeV. Results are compared for three initial conditions: μQ = 0, μQ constrained to B/2Q value, and μQ constrained to B/2Q along with μS constrained to 0. Uncertainties represent systematic errors."
"Choice on constraints: Extracted chemical freeze-out temperatures shown in panels (a), (c), and (e) and baryon chemical potentials shown in panels (b), (d), and (f) for GCE using particle yields as input for fitting, respectively, for Au+Au collisions at √sNN = 7.7, 19.6, and 39 GeV. Results are compared for three initial conditions: μQ = 0, μQ constrained to B/2Q value, and μQ constrained to B/2Q along with μS constrained to 0. Uncertainties represent systematic errors."
"Choice on including more particles: Extracted chemical freeze-out parameters (a) Tch, (b) μB, and (c) γS along with (d) χ2/ndf for GCE using particle yields as input for fitting. Results are compared for Au+Au collisions at √sNN = 39 GeV for four different sets of particle yields used in fitting. Uncertainties represent systematic errors."
"Choice on including more particles: Extracted chemical freeze-out parameters (a) Tch, (b) μB, and (c) γS along with (d) χ2/ndf for GCE using particle yields as input for fitting. Results are compared for Au+Au collisions at √sNN = 39 GeV for four different sets of particle yields used in fitting. Uncertainties represent systematic errors."
"Choice on including more particles: Extracted chemical freeze-out parameters (a) Tch, (b) μB, and (c) γS along with (d) χ2/ndf for GCE using particle yields as input for fitting. Results are compared for Au+Au collisions at √sNN = 39 GeV for four different sets of particle yields used in fitting. Uncertainties represent systematic errors."
"Choice on including more particles: Extracted chemical freeze-out parameters (a) Tch, (b) μB, and (c) γS along with (d) χ2/ndf for GCE using particle yields as input for fitting. Results are compared for Au+Au collisions at √sNN = 39 GeV for four different sets of particle yields used in fitting. Uncertainties represent systematic errors."
"Blast wave model fits of π±, K±, p and p p¯ T spectra in 0–5% central Au+Au collisions at √sNN = (a) 7.7, (b) 11.5, (c) 19.6, (d) 27, and (e) 39 GeV. Uncertainties on experimental data represent statistical and systematic uncertainties added in quadrature. Here, the uncertainties are smaller than the symbol size."
"Blast wave model fits of π±, K±, p and p p¯ T spectra in 0–5% central Au+Au collisions at √sNN = (a) 7.7, (b) 11.5, (c) 19.6, (d) 27, and (e) 39 GeV. Uncertainties on experimental data represent statistical and systematic uncertainties added in quadrature. Here, the uncertainties are smaller than the symbol size."
"Blast wave model fits of π±, K±, p and p p¯ T spectra in 0–5% central Au+Au collisions at √sNN = (a) 7.7, (b) 11.5, (c) 19.6, (d) 27, and (e) 39 GeV. Uncertainties on experimental data represent statistical and systematic uncertainties added in quadrature. Here, the uncertainties are smaller than the symbol size."
"Blast wave model fits of π±, K±, p and p p¯ T spectra in 0–5% central Au+Au collisions at √sNN = (a) 7.7, (b) 11.5, (c) 19.6, (d) 27, and (e) 39 GeV. Uncertainties on experimental data represent statistical and systematic uncertainties added in quadrature. Here, the uncertainties are smaller than the symbol size."
"Blast wave model fits of π±, K±, p and p p¯ T spectra in 0–5% central Au+Au collisions at √sNN = (a) 7.7, (b) 11.5, (c) 19.6, (d) 27, and (e) 39 GeV. Uncertainties on experimental data represent statistical and systematic uncertainties added in quadrature. Here, the uncertainties are smaller than the symbol size."
"Variation of Tkin with <β> for different energies and centralities. The centrality increases from left to right for a given energy. The data points other than BES energies are taken from Refs. [43,66]. Uncertainties represent systematic uncertainties."
"Variation of Tkin with <β> for different energies and centralities. The centrality increases from left to right for a given energy. The data points other than BES energies are taken from Refs. [43,66]. Uncertainties represent systematic uncertainties."
"Variation of Tkin with <β> for different energies and centralities. The centrality increases from left to right for a given energy. The data points other than BES energies are taken from Refs. [43,66]. Uncertainties represent systematic uncertainties."
"Variation of Tkin with <β> for different energies and centralities. The centrality increases from left to right for a given energy. The data points other than BES energies are taken from Refs. [43,66]. Uncertainties represent systematic uncertainties."
"Variation of Tkin with <β> for different energies and centralities. The centrality increases from left to right for a given energy. The data points other than BES energies are taken from Refs. [43,66]. Uncertainties represent systematic uncertainties."
" (a) Energy dependence of kinetic and chemical freezeout temperatures for central heavy-ion collisions. The curves represent various theoretical predictions [81,82]. (b) Energy dependence of average transverse radial flow velocity for central heavy-ion collisions. The data points other than BES energies are taken from Refs. [43,53–64,66] and references therein. The BES data points are for 0–5% central collisions, AGS energies are mostly for 0–5%, SPS energies are for mostly 0–7%, and top RHIC and LHC energies are for 0–5% central collisions. Uncertainties represent systematic uncertainties."
Fluctuations of conserved quantities such as baryon number, charge, and strangeness are sensitive to the correlation length of the hot and dense matter created in relativistic heavy-ion collisions and can be used to search for the QCD critical point. We report the first measurements of the moments of net-kaon multiplicity distributions in Au+Au collisions at $\sqrt{s_{\rm NN}}$ = 7.7, 11.5, 14.5, 19.6, 27, 39, 62.4, and 200 GeV. The collision centrality and energy dependence of the mean ($M$), variance ($\sigma^2$), skewness ($S$), and kurtosis ($\kappa$) for net-kaon multiplicity distributions as well as the ratio $\sigma^2/M$ and the products $S\sigma$ and $\kappa\sigma^2$ are presented. Comparisons are made with Poisson and negative binomial baseline calculations as well as with UrQMD, a transport model (UrQMD) that does not include effects from the QCD critical point. Within current uncertainties, the net-kaon cumulant ratios appear to be monotonic as a function of collision energy.
Raw $\Delta N_k$ distributions in Au+Au collisions at 7.7 GeV for 0–5%, 30–40%, and 70–80% collision centralities at midrapidity. The distributions are not corrected for the finite centrality bin width effect nor the reconstruction efficiency.
Raw $\Delta N_k$ distributions in Au+Au collisions at 11.5 GeV for 0–5%, 30–40%, and 70–80% collision centralities at midrapidity. The distributions are not corrected for the finite centrality bin width effect nor the reconstruction efficiency.
Raw $\Delta N_k$ distributions in Au+Au collisions at 14.5 GeV for 0–5%, 30–40%, and 70–80% collision centralities at midrapidity. The distributions are not corrected for the finite centrality bin width effect nor the reconstruction efficiency.
Raw $\Delta N_k$ distributions in Au+Au collisions at 19.6 GeV for 0–5%, 30–40%, and 70–80% collision centralities at midrapidity. The distributions are not corrected for the finite centrality bin width effect nor the reconstruction efficiency.
Raw $\Delta N_k$ distributions in Au+Au collisions at 27 GeV for 0–5%, 30–40%, and 70–80% collision centralities at midrapidity. The distributions are not corrected for the finite centrality bin width effect nor the reconstruction efficiency.
Raw $\Delta N_k$ distributions in Au+Au collisions at 39 GeV for 0–5%, 30–40%, and 70–80% collision centralities at midrapidity. The distributions are not corrected for the finite centrality bin width effect nor the reconstruction efficiency.
Raw $\Delta N_k$ distributions in Au+Au collisions at 62.4 GeV for 0–5%, 30–40%, and 70–80% collision centralities at midrapidity. The distributions are not corrected for the finite centrality bin width effect nor the reconstruction efficiency.
Raw $\Delta N_k$ distributions in Au+Au collisions at 200 GeV for 0–5%, 30–40%, and 70–80% collision centralities at midrapidity. The distributions are not corrected for the finite centrality bin width effect nor the reconstruction efficiency.
Collision centrality dependence of cumulants (C1, C2, C3, and C4) of $\Delta N_k$ distributions in Au+Au collisions at 7.7 GeV. The error bars are statistical uncertainties and the caps represent systematic uncertainties.
Collision centrality dependence of cumulants (C1, C2, C3, and C4) of $\Delta N_k$ distributions in Au+Au collisions at 11.5 GeV. The error bars are statistical uncertainties and the caps represent systematic uncertainties.
Collision centrality dependence of cumulants (C1, C2, C3, and C4) of $\Delta N_k$ distributions in Au+Au collisions at 14.5 GeV. The error bars are statistical uncertainties and the caps represent systematic uncertainties.
Collision centrality dependence of cumulants (C1, C2, C3, and C4) of $\Delta N_k$ distributions in Au+Au collisions at 19.6 GeV. The error bars are statistical uncertainties and the caps represent systematic uncertainties.
Collision centrality dependence of cumulants (C1, C2, C3, and C4) of $\Delta N_k$ distributions in Au+Au collisions at 27 GeV. The error bars are statistical uncertainties and the caps represent systematic uncertainties.
Collision centrality dependence of cumulants (C1, C2, C3, and C4) of $\Delta N_k$ distributions in Au+Au collisions at 39 GeV. The error bars are statistical uncertainties and the caps represent systematic uncertainties.
Collision centrality dependence of cumulants (C1, C2, C3, and C4) of $\Delta N_k$ distributions in Au+Au collisions at 62.4 GeV. The error bars are statistical uncertainties and the caps represent systematic uncertainties.
Collision centrality dependence of cumulants (C1, C2, C3, and C4) of $\Delta N_k$ distributions in Au+Au collisions at 200 GeV. The error bars are statistical uncertainties and the caps represent systematic uncertainties.
Collision centrality dependence of the $M/\sigma^2$ for $\Delta N_k$ distributions in Au+Au collisions at 7.7 GeV. The error bars are statistical uncertainties and the caps represent systematic uncertainties.
Collision centrality dependence of the $M/\sigma^2$ for $\Delta N_k$ distributions in Au+Au collisions at 11.5 GeV. The error bars are statistical uncertainties and the caps represent systematic uncertainties.
Collision centrality dependence of the $M/\sigma^2$ for $\Delta N_k$ distributions in Au+Au collisions at 14.5 GeV. The error bars are statistical uncertainties and the caps represent systematic uncertainties.
Collision centrality dependence of the $M/\sigma^2$ for $\Delta N_k$ distributions in Au+Au collisions at 19.6 GeV. The error bars are statistical uncertainties and the caps represent systematic uncertainties.
Collision centrality dependence of the $M/\sigma^2$ for $\Delta N_k$ distributions in Au+Au collisions at 27 GeV. The error bars are statistical uncertainties and the caps represent systematic uncertainties.
Collision centrality dependence of the $M/\sigma^2$ for $\Delta N_k$ distributions in Au+Au collisions at 39 GeV. The error bars are statistical uncertainties and the caps represent systematic uncertainties.
Collision centrality dependence of the $M/\sigma^2$ for $\Delta N_k$ distributions in Au+Au collisions at 62.4 GeV. The error bars are statistical uncertainties and the caps represent systematic uncertainties.
Collision centrality dependence of the $M/\sigma^2$ for $\Delta N_k$ distributions in Au+Au collisions at 200 GeV. The error bars are statistical uncertainties and the caps represent systematic uncertainties.
Collision centrality dependence of the $S\sigma$ for $\Delta N_k$ distributions in Au+Au collisions at 7.7 GeV. The error bars are statistical uncertainties and the caps represent systematic uncertainties.
Collision centrality dependence of the $S\sigma$ for $\Delta N_k$ distributions in Au+Au collisions at 11.5 GeV. The error bars are statistical uncertainties and the caps represent systematic uncertainties.
Collision centrality dependence of the $S\sigma$ for $\Delta N_k$ distributions in Au+Au collisions at 14.5 GeV. The error bars are statistical uncertainties and the caps represent systematic uncertainties.
Collision centrality dependence of the $S\sigma$ for $\Delta N_k$ distributions in Au+Au collisions at 19.6 GeV. The error bars are statistical uncertainties and the caps represent systematic uncertainties.
Collision centrality dependence of the $S\sigma$ for $\Delta N_k$ distributions in Au+Au collisions at 27 GeV. The error bars are statistical uncertainties and the caps represent systematic uncertainties.
Collision centrality dependence of the $S\sigma$ for $\Delta N_k$ distributions in Au+Au collisions at 39 GeV. The error bars are statistical uncertainties and the caps represent systematic uncertainties.
Collision centrality dependence of the $S\sigma$ for $\Delta N_k$ distributions in Au+Au collisions at 62.4 GeV. The error bars are statistical uncertainties and the caps represent systematic uncertainties.
Collision centrality dependence of the $S\sigma$ for $\Delta N_k$ distributions in Au+Au collisions at 200 GeV. The error bars are statistical uncertainties and the caps represent systematic uncertainties.
Collision centrality dependence of the $\kappa\sigma^2$ for $\Delta N_k$ distributions in Au+Au collisions at 7.7 GeV. The error bars are statistical uncertainties and the caps represent systematic uncertainties.
Collision centrality dependence of the $\kappa\sigma^2$ for $\Delta N_k$ distributions in Au+Au collisions at 11.5 GeV. The error bars are statistical uncertainties and the caps represent systematic uncertainties.
Collision centrality dependence of the $\kappa\sigma^2$ for $\Delta N_k$ distributions in Au+Au collisions at 14.5 GeV. The error bars are statistical uncertainties and the caps represent systematic uncertainties.
Collision centrality dependence of the $\kappa\sigma^2$ for $\Delta N_k$ distributions in Au+Au collisions at 19.6 GeV. The error bars are statistical uncertainties and the caps represent systematic uncertainties.
Collision centrality dependence of the $\kappa\sigma^2$ for $\Delta N_k$ distributions in Au+Au collisions at 27 GeV. The error bars are statistical uncertainties and the caps represent systematic uncertainties.
Collision centrality dependence of the $\kappa\sigma^2$ for $\Delta N_k$ distributions in Au+Au collisions at 39 GeV. The error bars are statistical uncertainties and the caps represent systematic uncertainties.
Collision centrality dependence of the $\kappa\sigma^2$ for $\Delta N_k$ distributions in Au+Au collisions at 62.4 GeV. The error bars are statistical uncertainties and the caps represent systematic uncertainties.
Collision centrality dependence of the $\kappa\sigma^2$ for $\Delta N_k$ distributions in Au+Au collisions at 200 GeV. The error bars are statistical uncertainties and the caps represent systematic uncertainties.
Collisions energy dependence of $M/\sigma^2$ for $\Delta N_k$ multiplicity distributions from 0–5% most central and 70–80% peripheral collisions in Au+Au collisions at \sqrt{s_{NN}} = 7.7, 11.5, 14.5, 19.6, 27, 39, 62.4 and 200 GeV. The error bars are statistical uncertainties and the caps represent systematic uncertainties.
Collisions energy dependence of $S\sigma$ for $\Delta N_k$ multiplicity distributions from 0–5% most central and 70–80% peripheral collisions in Au+Au collisions at \sqrt{s_{NN}} = 7.7, 11.5, 14.5, 19.6, 27, 39, 62.4 and 200 GeV. The error bars are statistical uncertainties and the caps represent systematic uncertainties.
Collisions energy dependence of $\kappa\sigma^2$ for $\Delta N_k$ multiplicity distributions from 0–5% most central and 70–80% peripheral collisions in Au+Au collisions at \sqrt{s_{NN}} = 7.7, 11.5, 14.5, 19.6, 27, 39, 62.4 and 200 GeV. The error bars are statistical uncertainties and the caps represent systematic uncertainties.
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.
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 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 $μ_B$ 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.
Elliptic flow ($v_{2}$) values for identified particles at mid-rapidity in Au+Au collisions, measured by the STAR experiment in the Beam Energy Scan at RHIC at $\sqrt{s_{NN}}=$ 7.7--62.4 GeV, are presented. A beam-energy dependent difference of the values of $v_{2}$ between particles and corresponding anti-particles was observed. The difference increases with decreasing beam energy and is larger for baryons compared to mesons. This implies that, at lower energies, particles and anti-particles are not consistent with the universal number-of-constituent-quark (NCQ) scaling of $v_{2}$ that was observed at $\sqrt{s_{NN}}=$ 200 GeV.
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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We present measurements of three-particle correlations for various harmonics in Au+Au collisions at energies ranging from $\sqrt{s_{{\rm NN}}}=7.7$ to 200 GeV using the STAR detector. The quantity $\langle\cos(m\phi_1+n\phi_2-(m+n)\phi_3)\rangle$ is evaluated as a function of $\sqrt{s_{{\rm NN}}}$, collision centrality, transverse momentum, $p_T$, pseudo-rapidity difference, $\Delta\eta$, and harmonics ($m$ and $n$). These data provide detailed information on global event properties like the three-dimensional structure of the initial overlap region, the expansion dynamics of the matter produced in the collisions, and the transport properties of the medium. A strong dependence on $\Delta\eta$ is observed for most harmonic combinations consistent with breaking of longitudinal boost invariance. Data reveal changes with energy in the two-particle correlation functions relative to the second-harmonic event-plane and provide ways to constrain models of heavy-ion collisions over a wide range of collision energies.
We report measurements of the nuclear modification factor, $R_{ \mathrm{CP}}$, for charged hadrons as well as identified $\pi^{+(-)}$, $K^{+(-)}$, and $p(\overline{p})$ for Au+Au collision energies of $\sqrt{s_{_{ \mathrm{NN}}}}$ = 7.7, 11.5, 14.5, 19.6, 27, 39, and 62.4 GeV. We observe a clear high-$p_{\mathrm{T}}$ net suppression in central collisions at 62.4 GeV for charged hadrons which evolves smoothly to a large net enhancement at lower energies. This trend is driven by the evolution of the pion spectra, but is also very similar for the kaon spectra. While the magnitude of the proton $R_{ \mathrm{CP}}$ at high $p_{\mathrm{T}}$ does depend on collision energy, neither the proton nor the anti-proton $R_{ \mathrm{CP}}$ at high $p_{\mathrm{T}}$ exhibit net suppression at any energy. A study of how the binary collision scaled high-$p_{\mathrm{T}}$ yield evolves with centrality reveals a non-monotonic shape that is consistent with the idea that jet-quenching is increasing faster than the combined phenomena that lead to enhancement.
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