Centrality dependence of particle production in p-Pb collisions at $\sqrt{s_{\rm NN} }$= 5.02 TeV

The ALICE collaboration Adam, Jaroslav ; Adamova, Dagmar ; Aggarwal, Madan Mohan ; et al.
Phys.Rev. C91 (2015) 064905, 2015.
Inspire Record 1335350 DOI 10.17182/hepdata.68361

We report measurements of the primary charged-particle pseudorapidity density and transverse momentum distributions in p-Pb collisions at sNN=5.02TeV and investigate their correlation with experimental observables sensitive to the centrality of the collision. Centrality classes are defined by using different event-activity estimators, i.e., charged-particle multiplicities measured in three different pseudorapidity regions as well as the energy measured at beam rapidity (zero degree). The procedures to determine the centrality, quantified by the number of participants (Npart) or the number of nucleon-nucleon binary collisions (Ncoll) are described. We show that, in contrast to Pb-Pb collisions, in p-Pb collisions large multiplicity fluctuations together with the small range of participants available generate a dynamical bias in centrality classes based on particle multiplicity. We propose to use the zero-degree energy, which we expect not to introduce a dynamical bias, as an alternative event-centrality estimator. Based on zero-degree energy-centrality classes, the Npart dependence of particle production is studied. Under the assumption that the multiplicity measured in the Pb-going rapidity region scales with the number of Pb participants, an approximate independence of the multiplicity per participating nucleon measured at mid-rapidity of the number of participating nucleons is observed. Furthermore, at high-pT the p-Pb spectra are found to be consistent with the pp spectra scaled by Ncoll for all centrality classes. Our results represent valuable input for the study of the event-activity dependence of hard probes in p-Pb collisions and, hence, help to establish baselines for the interpretation of the Pb-Pb data.

10 data tables

dNdeta CL1.

dNdeta V0M.

dNdeta V0A.

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Inclusive photon production at forward rapidities in proton-proton collisions at $\sqrt{s}$ = 0.9, 2.76 and 7 TeV

The ALICE collaboration Abelev, Betty Bezverkhny ; Adam, Jaroslav ; Adamova, Dagmar ; et al.
Eur.Phys.J. C75 (2015) 146, 2015.
Inspire Record 1328669 DOI 10.17182/hepdata.69495

The multiplicity and pseudorapidity distributions of inclusive photons have been measured at forward rapidities ( $2.3 < \eta < 3.9$ ) in proton–proton collisions at three center-of-mass energies, $\sqrt{s}$   $=$ 0.9, 2.76 and 7 TeV using the ALICE detector. It is observed that the increase in the average photon multiplicity as a function of beam energy is compatible with both a logarithmic and a power-law dependence. The relative increase in average photon multiplicity produced in inelastic pp collisions at 2.76 and 7 TeV center-of-mass energies with respect to 0.9 TeV are 37.2 $\pm $ 0.3 % (stat) $\pm $ 8.8 % (sys) and 61.2 $\pm $ 0.3 % (stat) $\pm $ 7.6 % (sys), respectively. The photon multiplicity distributions for all center-of-mass energies are well described by negative binomial distributions. The multiplicity distributions are also presented in terms of KNO variables. The results are compared to model predictions, which are found in general to underestimate the data at large photon multiplicities, in particular at the highest center-of-mass energy. Limiting fragmentation behavior of photons has been explored with the data, but is not observed in the measured pseudorapidity range.

8 data tables

Photon multiplicity distribution for INEL proton-proton collisions at sqrt(s)=0.9 TeV.

Photon multiplicity distribution for INEL proton-proton collisions at sqrt(s)=2.76 TeV.

Photon multiplicity distribution for INEL proton-proton collisions at sqrt(s)=7 TeV.

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Charged jet cross sections and properties in proton-proton collisions at $\sqrt{s}=7$ TeV

The ALICE collaboration Abelev, Betty Bezverkhny ; Adam, Jaroslav ; Adamova, Dagmar ; et al.
Phys.Rev. D91 (2015) 112012, 2015.
Inspire Record 1328629 DOI 10.17182/hepdata.68515

The differential charged jet cross sections, jet fragmentation distributions, and jet shapes are measured in minimum bias proton-proton collisions at center-of-mass energy s=7  TeV using the ALICE detector at the LHC. Jets are reconstructed from charged particle momenta in the midrapidity region using the sequential recombination kT and anti-kT as well as the SISCone jet finding algorithms with several resolution parameters in the range R=0.2–0.6. Differential jet production cross sections measured with the three jet finders are in agreement in the transverse momentum (pT) interval 20<pTjet,ch<100  GeV/c. They are also consistent with prior measurements carried out at the LHC by the ATLAS Collaboration. The jet charged particle multiplicity rises monotonically with increasing jet pT, in qualitative agreement with prior observations at lower energies. The transverse profiles of leading jets are investigated using radial momentum density distributions as well as distributions of the average radius containing 80% (⟨R80⟩) of the reconstructed jet pT. The fragmentation of leading jets with R=0.4 using scaled pT spectra of the jet constituents is studied. The measurements are compared to model calculations from event generators (PYTHIA, PHOJET, HERWIG). The measured radial density distributions and ⟨R80⟩ distributions are well described by the PYTHIA model (tune Perugia-2011). The fragmentation distributions are better described by HERWIG.

73 data tables

Measured charged jet differential cross sections for INEL proton-proton collisions at $\sqrt{s}$ = 7 TeV.

Measured charged jet differential cross sections for INEL proton-proton collisions at $\sqrt{s}$ = 7 TeV.

Measured charged jet differential cross sections for INEL proton-proton collisions at $\sqrt{s}$ = 7 TeV.

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Production of inclusive $\Upsilon$(1S) and $\Upsilon$(2S) in p-Pb collisions at $\mathbf{\sqrt{s_{{\rm NN}}} = 5.02}$ TeV

The ALICE collaboration Abelev, Betty Bezverkhny ; Adam, Jaroslav ; Adamova, Dagmar ; et al.
Phys.Lett. B740 (2015) 105-117, 2015.
Inspire Record 1321022 DOI 10.17182/hepdata.66344

We report on the production of inclusive ϒ (1S) and ϒ (2S) in p–Pb collisions at sNN=5.02 TeV at the LHC. The measurement is performed with the ALICE detector at backward ( −4.46<ycms<−2.96 ) and forward ( 2.03<ycms<3.53 ) rapidity down to zero transverse momentum. The production cross sections of the ϒ (1S) and ϒ (2S) are presented, as well as the nuclear modification factor and the ratio of the forward to backward yields of ϒ (1S). A suppression of the inclusive ϒ (1S) yield in p–Pb collisions with respect to the yield from pp collisions scaled by the number of binary nucleon–nucleon collisions is observed at forward rapidity but not at backward rapidity. The results are compared to theoretical model calculations including nuclear shadowing or partonic energy loss effects.

7 data tables

Inclusive UPSI(1S) production cross section as a function of rapidity in p-Pb collisions at sqrt(s_NN) = 5.02 TeV. The data was collected in 2013 with two beam configurations, p-Pb and Pb-p with integrated luminosities of 5.0 nb-1 and 5.8 nb-1, respectively.

Inclusive UPSI(1S) production cross section as a function of rapidity in p-Pb collisions at sqrt(s_NN) = 5.02 TeV. The data was collected in 2013 with two beam configurations, p-Pb and Pb-p with integrated luminosities of 5.0 nb-1 and 5.8 nb-1, respectively.

Inclusive UPSI(2S) production cross section as a function of rapidity in p-Pb collisions at sqrt(s_NN) = 5.02 TeV. The data was collected in 2013 with two beam configurations, p-Pb and Pb-p with integrated luminosities of 5.0 nb-1 and 5.8 nb-1, respectively.

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Event-by-event mean ${p}_{\mathbf {T}}$ fluctuations in pp and Pb-Pb collisions at the LHC

The ALICE collaboration Abelev, Betty Bezverkhny ; Adam, Jaroslav ; Adamova, Dagmar ; et al.
Eur.Phys.J. C74 (2014) 3077, 2014.
Inspire Record 1307102 DOI 10.17182/hepdata.66332

Event-by-event fluctuations of the mean transverse momentum of charged particles produced in pp collisions at $\sqrt{s}$ = 0.9, 2.76 and 7 TeV, and Pb–Pb collisions at $\sqrt{s_\mathrm{NN}}$   = 2.76 TeV are studied as a function of the charged-particle multiplicity using the ALICE detector at the LHC. Dynamical fluctuations indicative of correlated particle emission are observed in all systems. The results in pp collisions show little dependence on collision energy. The Monte Carlo event generators PYTHIA and PHOJET are in qualitative agreement with the data. Peripheral Pb–Pb data exhibit a similar multiplicity dependence as that observed in pp. In central Pb–Pb, the results deviate from this trend, featuring a significant reduction of the fluctuation strength. The results in Pb–Pb are in qualitative agreement with previous measurements in Au–Au at lower collision energies and with expectations from models that incorporate collective phenomena.

8 data tables

Relative fluctuation $\sqrt{C_m}/M(p_{\rm T})_m$ as a function of $\langle {\rm d}N_{\rm ch}/{\rm d}\eta \rangle$ in pp collisions at $\sqrt{s}$ = 0.9 TeV.

Relative fluctuation $\sqrt{C_m}/M(p_{\rm T})_m$ as a function of $\langle {\rm d}N_{\rm ch}/{\rm d}\eta \rangle$ in pp collisions at $\sqrt{s}$ = 2.76 TeV.

Relative fluctuation $\sqrt{C_m}/M(p_{\rm T})_m$ as a function of $\langle {\rm d}N_{\rm ch}/{\rm d}\eta \rangle$ in pp collisions at $\sqrt{s}$ = 7 TeV.

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Exclusive $\mathrm{J/}\psi$ photoproduction off protons in ultra-peripheral p-Pb collisions at $\sqrt{s_{\rm NN}}=5.02$ TeV

The ALICE collaboration Abelev, Betty Bezverkhny ; Adam, Jaroslav ; Adamova, Dagmar ; et al.
Phys.Rev.Lett. 113 (2014) 232504, 2014.
Inspire Record 1303903 DOI 10.17182/hepdata.64378
2 data tables

Differential cross sections as a function of rapidity for exclusive J/PSI photoproduction off protons in ultra-peripheral p-Pb collisions. The corresponding J/PSI photoproduction cross sections in bins of the GAMMA-P centre-of-mass, W(GAMMA P), are also presented.

Differential cross section as a function of rapidity for exclusive J/PSI photoproduction off protons in ultra-peripheral Pb-p collisions. The corresponding J/PSI photoproduction cross section in a range of the GAMMA-P centre-of-mass, W(GAMMA P), is also presented.


Multiplicity dependence of jet-like two-particle correlation structures in p–Pb collisions at $\sqrt{s_{NN}}$=5.02 TeV

The ALICE collaboration Abelev, Betty Bezverkhny ; Adam, Jaroslav ; Adamova, Dagmar ; et al.
Phys.Lett. B741 (2015) 38-50, 2015.
Inspire Record 1301858 DOI 10.17182/hepdata.64972
9 data tables

near-side per-trigger yield vs V0A multiplicity.

away-side per-trigger yield vs V0A multiplicity.

V0A per-trigger yield vs midrapidity charged-particle multiplicity.

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Production of $\Sigma(1385)^{\pm}$ and $\Xi(1530)^{0}$ in proton-proton collisions at $\sqrt{s}=$ 7 TeV

The ALICE collaboration Abelev, Betty Bezverkhny ; Adam, Jaroslav ; Adamova, Dagmar ; et al.
Eur.Phys.J. C75 (2015) 1, 2015.
Inspire Record 1300380 DOI 10.17182/hepdata.66563

The production of the strange and double-strange baryon resonances ( $\Sigma (1385)^{\pm }$ , $\Xi (1530)^{0}$ ) has been measured at mid-rapidity ( $\left| y \right| $ $<0.5$ ) in proton–proton collisions at $\sqrt{s}$   $=$  7 TeV with the ALICE detector at the LHC. Transverse momentum spectra for inelastic collisions are compared to QCD-inspired models, which in general underpredict the data. A search for the $\phi (1860)$ pentaquark, decaying in the $\Xi \pi $ channel, has been carried out but no evidence is seen.

3 data tables

Inelastic baryon yields, d2N/(dydpT), per pT interval per unit rapidity for Sigma(1385)+- in INEL pp collisions at sqrts 7 TeV in |y| < 0.5.

Inelastic baryon yields, d2N/(dydpT), per pT interval per unit rapidity for Xi(1530)0 in INEL pp collisions at sqrts 7 TeV in |y| < 0.5.

Mean pT as function of the mass for particles measured with the ALICE detector in INEL pp collisions at sqrts 7 TeV in |y| < 0.5.


Multiparticle azimuthal correlations in p -Pb and Pb-Pb collisions at the CERN Large Hadron Collider

The ALICE collaboration Abelev, Betty Bezverkhny ; Adam, Jaroslav ; Adamova, Dagmar ; et al.
Phys.Rev. C90 (2014) 054901, 2014.
Inspire Record 1300038 DOI 10.17182/hepdata.65710

<p>Measurements of multiparticle azimuthal correlations (cumulants) for charged particles in <inline-formula><mml:math><mml:mi>p</mml:mi></mml:math></inline-formula>-Pb at <inline-formula><mml:math><mml:mrow><mml:msqrt><mml:msub><mml:mi>s</mml:mi><mml:mi>NN</mml:mi></mml:msub></mml:msqrt><mml:mo>=</mml:mo><mml:mn>5.02</mml:mn></mml:mrow></mml:math></inline-formula> TeV and Pb-Pb at <inline-formula><mml:math><mml:mrow><mml:msqrt><mml:msub><mml:mi>s</mml:mi><mml:mi>NN</mml:mi></mml:msub></mml:msqrt><mml:mo>=</mml:mo><mml:mn>2.76</mml:mn></mml:mrow></mml:math></inline-formula> TeV collisions are presented. They help address the question of whether there is evidence for global, flowlike, azimuthal correlations in the <inline-formula><mml:math><mml:mi>p</mml:mi></mml:math></inline-formula>-Pb system. Comparisons are made to measurements from the larger Pb-Pb system, where such evidence is established. In particular, the second harmonic two-particle cumulants are found to decrease with multiplicity, characteristic of a dominance of few-particle correlations in <inline-formula><mml:math><mml:mi>p</mml:mi></mml:math></inline-formula>-Pb collisions. However, when a <inline-formula><mml:math><mml:mrow><mml:mo>|</mml:mo><mml:mi>Δ</mml:mi><mml:mi>η</mml:mi><mml:mo>|</mml:mo></mml:mrow></mml:math></inline-formula> gap is placed to suppress such correlations, the two-particle cumulants begin to rise at high multiplicity, indicating the presence of global azimuthal correlations. The Pb-Pb values are higher than the <inline-formula><mml:math><mml:mi>p</mml:mi></mml:math></inline-formula>-Pb values at similar multiplicities. In both systems, the second harmonic four-particle cumulants exhibit a transition from positive to negative values when the multiplicity increases. The negative values allow for a measurement of <inline-formula><mml:math><mml:mrow><mml:msub><mml:mi>v</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:mrow><mml:mo>{</mml:mo><mml:mn>4</mml:mn><mml:mo>}</mml:mo></mml:mrow></mml:mrow></mml:math></inline-formula> to be made, which is found to be higher in Pb-Pb collisions at similar multiplicities. The second harmonic six-particle cumulants are also found to be higher in Pb-Pb collisions. In Pb-Pb collisions, we generally find <inline-formula><mml:math><mml:mrow><mml:msub><mml:mi>v</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:mrow><mml:mo>{</mml:mo><mml:mn>4</mml:mn><mml:mo>}</mml:mo></mml:mrow><mml:mo>≃</mml:mo><mml:msub><mml:mi>v</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:mrow><mml:mo>{</mml:mo><mml:mn>6</mml:mn><mml:mo>}</mml:mo></mml:mrow><mml:mo>≠</mml:mo><mml:mn>0</mml:mn></mml:mrow></mml:math></inline-formula> which is indicative of a Bessel-Gaussian function for the <inline-formula><mml:math><mml:msub><mml:mi>v</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:math></inline-formula> distribution. For very high-multiplicity Pb-Pb collisions, we observe that the four- and six-particle cumulants become consistent with 0. Finally, third harmonic two-particle cumulants in <inline-formula><mml:math><mml:mi>p</mml:mi></mml:math></inline-formula>-Pb and Pb-Pb are measured. These are found to be similar for overlapping multiplicities, when a <inline-formula><mml:math><mml:mrow><mml:mo>|</mml:mo><mml:mi>Δ</mml:mi><mml:mi>η</mml:mi><mml:mo>|</mml:mo><mml:mo>&gt;</mml:mo><mml:mn>1.4</mml:mn></mml:mrow></mml:math></inline-formula> gap is placed.</p>

42 data tables

No description provided.

No description provided.

No description provided.

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Elliptic flow of identified hadrons in Pb-Pb collisions at $ \sqrt{s_{\mathrm{NN}}}=2.76 $ TeV

The ALICE collaboration Abelev, Betty Bezverkhny ; Adam, Jaroslav ; Adamova, Dagmar ; et al.
JHEP 1506 (2015) 190, 2015.
Inspire Record 1297103 DOI 10.17182/hepdata.68162
66 data tables

Charged pions v2 as a function of pT for centrality: 0-5%.

Charged pions v2 as a function of pT for centrality: 5-10%.

Charged pions v2 as a function of pT for centrality: 10-20%.

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Suppression of $\Upsilon (1S)$ at forward rapidity in Pb-Pb collisions at $\sqrt{s_{\rm NN}} = 2.76$ TeV

The ALICE collaboration Abelev, Betty Bezverkhny ; Adam, Jaroslav ; Adamova, Dagmar ; et al.
Phys.Lett. B738 (2014) 361-372, 2014.
Inspire Record 1297101 DOI 10.17182/hepdata.64436
2 data tables

Inclusive Upsilon (1S) Nuclear Modification Factor (Raa) measured in Lead-Lead collisions at sqrt(sNN) = 2.76 TeV in 2.5 < y < 4 and pt > 0 GeV, as a function of the average number of participating nucleons (<Npart>). Data have been collected in 2011 and the integrated luminosity is ~ 70 inverse microbarn.

Inclusive Upsilon (1S) Nuclear Modification Factor (Raa) measured in Lead-Lead collisions at sqrt(sNN) = 2.76 TeV in 2.5 < y < 4 and pt > 0 GeV, as a function of the rapidity. Data have been collected in 2011 and the integrated luminosity is ~ 70 inverse microbarn.


Beauty production in pp collisions at $\sqrt{s}$ = 2.76 TeV measured via semi-electronic decays

The ALICE collaboration Abelev, Betty Bezverkhny ; Adam, Jaroslav ; Adamova, Dagmar ; et al.
Phys.Lett. B738 (2014) 97-108, 2014.
Inspire Record 1296861 DOI 10.17182/hepdata.858

The ALICE Collaboration at the LHC reports measurement of the inclusive production cross section of electrons from semi-leptonic decays of beauty hadrons with rapidity |y|<0.8 and transverse momentum 1<pT<10 GeV/c , in pp collisions at s=2.76 TeV . Electrons not originating from semi-electronic decay of beauty hadrons are suppressed using the impact parameter of the corresponding tracks. The production cross section of beauty decay electrons is compared to the result obtained with an alternative method which uses the distribution of the azimuthal angle between heavy-flavour decay electrons and charged hadrons. Perturbative QCD predictions agree with the measured cross section within the experimental and theoretical uncertainties. The integrated visible cross section, σb→e=3.47±0.40(stat)−1.33+1.12(sys)±0.07(norm) μb , was extrapolated to full phase space using Fixed Order plus Next-to-Leading Log (FONLL) calculations to obtain the total bb¯ production cross section, σbb¯=130±15.1(stat)−49.8+42.1(sys)−3.1+3.4(extr)±2.5(norm)±4.4(BR) μb .

8 data tables

Azimuthal correlation distribution between heavy-flavour decay electrons and charged hadrons, scaled by the number of electrons in minimum bias triggered events in the electron transverse momentum range 1.5-2.5 GeV/$c$.

Azimuthal correlation distribution between heavy-flavour decay electrons and charged hadrons, scaled by the number of electrons in EMCal triggered events in the electron transverse momentum range 4.5-6 GeV/$c$.

Relative beauty contribution to the heavy-flavour electron yield obtained with the method based on the track impact parameter.

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Measurement of electrons from semileptonic heavy-flavor hadron decays in $pp$ collisions at $\sqrt{s} = 2.76$ TeV

The ALICE collaboration Abelev, Betty Bezverkhny ; Adam, Jaroslav ; Adamova, Dagmar ; et al.
Phys.Rev. D91 (2015) 012001, 2015.
Inspire Record 1296860 DOI 10.17182/hepdata.64030

<p>The <inline-formula><mml:math display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi>p</mml:mi></mml:mrow><mml:mrow><mml:mi mathvariant="normal">T</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math></inline-formula>-differential production cross section of electrons from semileptonic decays of heavy-flavor hadrons has been measured at midrapidity in proton-proton collisions at <inline-formula><mml:math display="inline"><mml:mrow><mml:msqrt><mml:mrow><mml:mi>s</mml:mi></mml:mrow></mml:msqrt><mml:mo>=</mml:mo><mml:mn>2.76</mml:mn><mml:mtext> </mml:mtext><mml:mtext> </mml:mtext><mml:mi>TeV</mml:mi></mml:mrow></mml:math></inline-formula> in the transverse momentum range <inline-formula><mml:math display="inline"><mml:mrow><mml:mn>0.5</mml:mn><mml:mo>&lt;</mml:mo><mml:msub><mml:mrow><mml:mi>p</mml:mi></mml:mrow><mml:mrow><mml:mi mathvariant="normal">T</mml:mi></mml:mrow></mml:msub><mml:mo>&lt;</mml:mo><mml:mn>12</mml:mn><mml:mtext> </mml:mtext><mml:mtext> </mml:mtext><mml:mi>GeV</mml:mi><mml:mo>/</mml:mo><mml:mi>c</mml:mi></mml:mrow></mml:math></inline-formula> with the ALICE detector at the LHC. The analysis was performed using minimum bias events and events triggered by the electromagnetic calorimeter. Predictions from perturbative QCD calculations agree with the data within the theoretical and experimental uncertainties.</p>

1 data table

Double-differential cross section for the production of electrons, i.e. (electron + positron)/2, from heavy-flavour hadron decays as a function of transverse momentum at mid-rapidity. The systematic uncertainties do not include an additional normalization uncertainty of 1.9%.


Neutral pion production at midrapidity in pp and Pb-Pb collisions at $\sqrt{s_{{\mathrm {NN}}}}= 2.76\,{\mathrm {TeV}}$

The ALICE collaboration Abelev, Betty Bezverkhny ; Adam, Jaroslav ; Adamova, Dagmar ; et al.
Eur.Phys.J. C74 (2014) 3108, 2014.
Inspire Record 1296306 DOI 10.17182/hepdata.30758

Invariant yields of neutral pions at midrapidity in the transverse momentum range $0.6 < p_\mathrm{T}< 12\,{\mathrm \mathrm{GeV}}/$ c measured in Pb–Pb collisions at $\sqrt{s_{\mathrm {NN}}}= 2.76\,{\mathrm {\,}}\mathrm{TeV}$ are presented for six centrality classes. The pp reference spectrum was measured in the range $0.4 < p_\mathrm{T}< 10\,{\mathrm {\,}}\mathrm{GeV}/$ c at the same center-of-mass energy. The nuclear modification factor, $R_\mathrm{{AA}}$ , shows a suppression of neutral pions in central Pb–Pb collisions by a factor of up to about $8{-}10$ for $5 \lesssim p_\mathrm{T}\lesssim 7\,{\mathrm \mathrm{GeV}}/$ c. The presented measurements are compared with results at lower center-of-mass energies and with theoretical calculations.

17 data tables

Invariant differential yields of PI0 produced in inelastic pp collisions at center-of-mass energy 2.76 TeV.

Invariant differential cross section of PI0 produced in inelastic pp collisions at center-of-mass energy 2.76 TeV, the uncertainty of \sigma_{inel} of 3.9% is not included in the systematic error.

Invariant differential yields of PI0 produced in 0-5% central inelastic PbPb collisions at center-of-mass energy per nucleon 2.76 TeV.

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Suppression of $\psi$(2S) production in p-Pb collisions at $\sqrt{s_{\rm NN}}$ = 5.02 TeV

The ALICE collaboration Abelev, Betty Bezverkhny ; Adam, Jaroslav ; Adamova, Dagmar ; et al.
JHEP 1412 (2014) 073, 2014.
Inspire Record 1296307 DOI 10.17182/hepdata.66529

The ALICE Collaboration has studied the inclusive production of the charmonium state ψ(2S) in proton-lead (p-Pb) collisions at the nucleon-nucleon centre of mass energy $ \sqrt{s_{\mathrm{NN}}} $ = 5.02 TeV at the CERN LHC. The measurement was performed at forward (2.03 < y$_{cms}$ < 3.53) and backward (−4.46 < y$_{cms}$ < −2.96) centre of mass rapidities, studying the decays into muon pairs. In this paper, we present the inclusive production cross sections σ$_{ψ(2S)}$, both integrated and as a function of the transverse momentum p$_{T}$, for the two y$_{cms}$ domains. The results are compared to those obtained for the 1S vector state (J/ψ), by showing the ratios between the production cross sections, as well as the double ratios [σ$_{ψ(2S)}$ /σ$_{J/ψ}$ ]$_{pPb}$ /[σ$_{ψ(2S)}$ /σ$_{J/ψ}$ ]$_{pp}$ between p-Pb and proton-proton collisions. Finally, the nuclear modification factor for inclusive ψ(2S) is evaluated and compared to the measurement of the same quantity for J/ψ and to theoretical models including parton shadowing and coherent energy loss mechanisms. The results show a significantly larger suppression of the ψ(2S) compared to that measured for J/ψ and to models. These observations represent a clear indication for sizeable final state effects on ψ(2S) production.

9 data tables

The cross section ratios B.R. sigma_Psi(2S)/ B.R. sigma_JPsi obtained in p-Pb and Pb-p collisions. The first uncertainty is statistical, the second one is systematic.

The double ratio [sigma(Psi(2S))/sigma(J/Psi)]_pA/[sigma(Psi(2S))/sigma(J/Psi)]_pp for p-Pb and Pb-p collisions. First uncertainty is statistical, the second one is the correlated systematic, while the third is the uncorrelated systematic.

The Psi(2S) nuclear modification factor RpA measured in pPb and Pbp collisions. The first uncertainty is statistical, the second one is the correlated systematic and the third the uncorrelated systematic.

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Measurement of prompt $D$-meson production in $p-Pb$ collisions at $\sqrt{s_{NN}}$ = 5.02 TeV

The ALICE collaboration Abelev, Betty Bezverkhny ; Adam, Jaroslav ; Adamova, Dagmar ; et al.
Phys.Rev.Lett. 113 (2014) 232301, 2014.
Inspire Record 1296081 DOI 10.17182/hepdata.63866

<p>The <inline-formula><mml:math display="inline"><mml:msub><mml:mi>p</mml:mi><mml:mi>T</mml:mi></mml:msub></mml:math></inline-formula>-differential production cross sections of the prompt charmed mesons <inline-formula><mml:math display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi>D</mml:mi></mml:mrow><mml:mrow><mml:mn>0</mml:mn></mml:mrow></mml:msup></mml:mrow></mml:math></inline-formula>, <inline-formula><mml:math display="inline"><mml:msup><mml:mi>D</mml:mi><mml:mo>+</mml:mo></mml:msup></mml:math></inline-formula>, <inline-formula><mml:math display="inline"><mml:msup><mml:mi>D</mml:mi><mml:mrow><mml:mo>*</mml:mo><mml:mo>+</mml:mo></mml:mrow></mml:msup></mml:math></inline-formula>, and <inline-formula><mml:math display="inline"><mml:mrow><mml:msubsup><mml:mrow><mml:mi>D</mml:mi></mml:mrow><mml:mrow><mml:mi>s</mml:mi></mml:mrow><mml:mrow><mml:mo>+</mml:mo></mml:mrow></mml:msubsup></mml:mrow></mml:math></inline-formula> and their charge conjugate in the rapidity interval <inline-formula><mml:math display="inline"><mml:mrow><mml:mo>-</mml:mo><mml:mn>0.96</mml:mn><mml:mo>&lt;</mml:mo><mml:msub><mml:mrow><mml:mi>y</mml:mi></mml:mrow><mml:mrow><mml:mtext>cms</mml:mtext></mml:mrow></mml:msub><mml:mo>&lt;</mml:mo><mml:mn>0.04</mml:mn></mml:mrow></mml:math></inline-formula> were measured in <inline-formula><mml:math display="inline"><mml:mrow><mml:mi>p</mml:mi><mml:mtext>-</mml:mtext><mml:mi>Pb</mml:mi></mml:mrow></mml:math></inline-formula> collisions at a center-of-mass energy <inline-formula><mml:math display="inline"><mml:mrow><mml:msqrt><mml:mrow><mml:msub><mml:mrow><mml:mi>s</mml:mi></mml:mrow><mml:mrow><mml:mi>N</mml:mi><mml:mi>N</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:msqrt><mml:mo>=</mml:mo><mml:mn>5.02</mml:mn><mml:mtext> </mml:mtext><mml:mtext> </mml:mtext><mml:mi>TeV</mml:mi></mml:mrow></mml:math></inline-formula> with the ALICE detector at the LHC. The nuclear modification factor <inline-formula><mml:math display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi>R</mml:mi></mml:mrow><mml:mrow><mml:mi>p</mml:mi><mml:mi>Pb</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math></inline-formula>, quantifying the <inline-formula><mml:math display="inline"><mml:mi>D</mml:mi></mml:math></inline-formula>-meson yield in <inline-formula><mml:math display="inline"><mml:mrow><mml:mi>p</mml:mi><mml:mtext>-</mml:mtext><mml:mi>Pb</mml:mi></mml:mrow></mml:math></inline-formula> collisions relative to the yield in <inline-formula><mml:math display="inline"><mml:mi>p</mml:mi><mml:mi>p</mml:mi></mml:math></inline-formula> collisions scaled by the number of binary nucleon-nucleon collisions, is compatible within the 15%–20% uncertainties with unity in the transverse momentum interval <inline-formula><mml:math display="inline"><mml:mrow><mml:mn>1</mml:mn><mml:mo>&lt;</mml:mo><mml:msub><mml:mrow><mml:mi>p</mml:mi></mml:mrow><mml:mrow><mml:mi>T</mml:mi></mml:mrow></mml:msub><mml:mo>&lt;</mml:mo><mml:mn>24</mml:mn><mml:mtext> </mml:mtext><mml:mtext> </mml:mtext><mml:mi>GeV</mml:mi><mml:mo stretchy="false">/</mml:mo><mml:mi>c</mml:mi></mml:mrow></mml:math></inline-formula>. No significant difference among the <inline-formula><mml:math display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi>R</mml:mi></mml:mrow><mml:mrow><mml:mi>p</mml:mi><mml:mi>Pb</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math></inline-formula> of the four <inline-formula><mml:math display="inline"><mml:mi>D</mml:mi></mml:math></inline-formula>-meson species is observed. The results are described within uncertainties by theoretical calculations that include initial-state effects. The measurement adds experimental evidence that the modification of the momentum spectrum of <inline-formula><mml:math display="inline"><mml:mi>D</mml:mi></mml:math></inline-formula> mesons observed in Pb-Pb collisions with respect to <inline-formula><mml:math display="inline"><mml:mi>p</mml:mi><mml:mi>p</mml:mi></mml:math></inline-formula> collisions is due to strong final-state effects induced by hot partonic matter.</p>

9 data tables

pT-differential cross section of prompt D0 mesons measured in p-Pb collisions in the rapidity interval -0.96<y_cms<0.04.

pT-differential cross section of prompt D+ mesons measured in p-Pb collisions in the rapidity interval -0.96<y_cms<0.04.

pT-differential cross section of prompt D*+ mesons measured in p-Pb collisions in the rapidity interval -0.96<y_cms<0.04.

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Transverse momentum dependence of inclusive primary charged-particle production in p-Pb collisions at $\sqrt{s_\mathrm{{NN}}}=5.02~\text {TeV}$

The ALICE collaboration Abelev, Betty Bezverkhny ; Adam, Jaroslav ; Adamova, Dagmar ; et al.
Eur.Phys.J. C74 (2014) 3054, 2014.
Inspire Record 1295687 DOI 10.17182/hepdata.63400
4 data tables

Transverse momentum distributions of charged particles in minimum-bias (NSD) p-Pb collisions for different pseudorapidity ranges.

The histogram represents the reference spectrum (cross section scaled by the nuclear overlap function, T(pPb)) in inelastic pp collisions, determined in |eta(cms)| < 0.8.

The ratio of spectra in p-Pb at backward pseudorapidities to that at |eta(cms)| < 0.3.

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Azimuthal anisotropy of D meson production in Pb-Pb collisions at $\sqrt{s_{\rm NN}} = 2.76$ TeV

The ALICE collaboration Abelev, Betty Bezverkhny ; Adam, Jaroslav ; Adamova, Dagmar ; et al.
Phys.Rev. C90 (2014) 034904, 2014.
Inspire Record 1294938 DOI 10.17182/hepdata.63499
4 data tables

Prompt D^0 meson v2 as a function of pT for centrality 0-10%. The first systematic uncertainty is from the data and the second from the B feed-down.

Prompt D^0 meson v2 as a function of pT for centrality 10-30%. The first systematic uncertainty is from the data and the second from the B feed-down.

Prompt D^0 meson v2 as a function of pT for centrality 30-50%. The first systematic uncertainty is from the data and the second from the B feed-down.

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Freeze-out radii extracted from three-pion cumulants in pp, p–Pb and Pb–Pb collisions at the LHC

The ALICE collaboration Abelev, Betty Bezverkhny ; Adam, Jaroslav ; Adamova, Dagmar ; et al.
Phys.Lett. B739 (2014) 139-151, 2014.
Inspire Record 1288705 DOI 10.17182/hepdata.65772

In high-energy collisions, the spatio-temporal size of the particle production region can be measured using the Bose–Einstein correlations of identical bosons at low relative momentum. The source radii are typically extracted using two-pion correlations, and characterize the system at the last stage of interaction, called kinetic freeze-out. In low-multiplicity collisions, unlike in high-multiplicity collisions, two-pion correlations are substantially altered by background correlations, e.g. mini-jets. Such correlations can be suppressed using three-pion cumulant correlations. We present the first measurements of the size of the system at freeze-out extracted from three-pion cumulant correlations in pp, p–Pb and Pb–Pb collisions at the LHC with ALICE. At similar multiplicity, the invariant radii extracted in p–Pb collisions are found to be 5–15% larger than those in pp, while those in Pb–Pb are 35–55% larger than those in p–Pb. Our measurements disfavor models which incorporate substantially stronger collective expansion in p–Pb as compared to pp collisions at similar multiplicity.

27 data tables

Mixed charge C3 and c3 in pp collisions projected against 1 of a mixed-charge pair invariant relative momentum.

Same charge C3 and c3 in pp collisions projected against Q3.

Same charge C3 and c3 in p Pb collisions projected against Q3.

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$K^*(892)^0$ and $ϕ(1020)$ production in Pb-Pb collisions at $\sqrt{s{NN}}$ = 2.76 TeV

The ALICE collaboration Abelev, Betty Bezverkhny ; Adam, Jaroslav ; Adamova, Dagmar ; et al.
Phys.Rev. C91 (2015) 024609, 2015.
Inspire Record 1288320 DOI 10.17182/hepdata.66630

The yields of the K*(892)$^{0}$ and $\Phi$(1020) resonances are measured in Pb-Pb collisions at $\sqrt{s_{\rm NN}}$ = 2.76 TeV through their hadronic decays using the ALICE detector. The measurements are performed in multiple centrality intervals at mid-rapidity (|$y$|<0.5) in the transverse-momentum ranges 0.3 < $p_{\rm T}$ < 5 GeV/$c$ for the K*(892)$^{0}$ and 0.5 < $p_{\rm T}$ < 5 GeV/$c$ for the $\Phi$(1020). The yields of K*(892)$^{0}$ are suppressed in central Pb-Pb collisions with respect to pp and peripheral Pb-Pb collisions (perhaps due to rescattering of its decay products in the hadronic medium), while the longer lived $\Phi$(1020) meson is not suppressed. These particles are also used as probes to study the mechanisms of particle production. The shape of the $p_{\rm T}$ distribution of the $\Phi$(1020) meson, but not its yield, is reproduced fairly well by hydrodynamic models for central Pb-Pb collisions. In central Pb-Pb collisions at low and intermediate $p_{\rm T}$, the p/$\Phi$(1020) ratio is flat in $p_{\rm T}$, while the p/$\pi$ and $\Phi$(1020)/$\pi$ ratios show a pronounced increase and have similar shapes to each other. These results indicate that the shapes of the $p_{\rm T}$ distributions of these particles in central Pb-Pb collisions are determined predominantly by the particle masses and radial flow. Finally, $\Phi$(1020) production in Pb-Pb collisions is enhanced, with respect to the yield in pp collisions and the yield of charged pions, by an amount similar to the $\Lambda$ and $\Xi$.

36 data tables

Transverse-momentum distributions of (K*(892)0 + anti-K*(892)0)/2 in Pb-Pb collisions at sqrt(sNN)=2.76 TeV, centrality 0.0-20.0%.

Transverse-momentum distributions of (K*(892)0 + anti-K*(892)0)/2 in Pb-Pb collisions at sqrt(sNN)=2.76 TeV, centrality 20.0-40.0%.

Transverse-momentum distributions of (K*(892)0 + anti-K*(892)0)/2 in Pb-Pb collisions at sqrt(sNN)=2.76 TeV, centrality 40.0-60.0%.

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Measurement of quarkonium production at forward rapidity in $pp$ collisions at $\sqrt{s} = 7$ TeV

The ALICE collaboration Abelev, Betty Bezverkhny ; Abramyan, Armenuhi ; Adam, Jaroslav ; et al.
Eur.Phys.J. C74 (2014) 2974, 2014.
Inspire Record 1285950 DOI 10.17182/hepdata.65214
14 data tables

Differential production cross sections of J/psi as a function of pT.

Differential production cross sections of J/psi as a function of rapidity.

integrated production cross section of J/psi.

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Production of charged pions, kaons and protons at large transverse momenta in pp and Pb–Pb collisions at $\sqrt{s_{\rm NN}}$ =2.76 TeV

The ALICE collaboration Abelev, Betty Bezverkhny ; Adam, Jaroslav ; Adamova, Dagmar ; et al.
Phys.Lett. B736 (2014) 196-207, 2014.
Inspire Record 1276299 DOI 10.17182/hepdata.62520
7 data tables

Invariant yields of identified pions in central and peripheral Pb-Pb collisions, together with the unscaled pp reference yields.

Invariant yields of identified kaons in central and peripheral Pb-Pb collisions, together with the unscaled pp reference yields.

Invariant yields of identified protons in central and peripheral Pb-Pb collisions, together with the unscaled pp reference yields.

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Centrality, rapidity and transverse momentum dependence of $J/\psi$ suppression in Pb-Pb collisions at $\sqrt{s_{\rm NN}}$=2.76 TeV

The ALICE collaboration Abelev, Betty Bezverkhny ; Adam, Jaroslav ; Adamova, Dagmar ; et al.
Phys.Lett. B734 (2014) 314-327, 2014.
Inspire Record 1263062 DOI 10.17182/hepdata.63191
5 data tables

Inclusive Jpsi Nuclear Modification Factor (Raa) measured in Lead-Lead collisions at sqrt(sNN) = 2.76 TeV in 2.5 < y < 4 and 0 < pt < 8 GeV/c, as a function of the average number of participating nucleons (<Npart>). Data have been collected in 2011 and the integrated luminosity is ~ 70 inverse microbarn.

Inclusive Jpsi Nuclear Modification Factor (Raa) measured in Lead-Lead collisions at sqrt(sNN) = 2.76 TeV in |y| < 0.8 and pt > 0 GeV/c, as a function of the average number of participating nucleons (<Npart>). Data have been collected in 2010 and 2011 and the integrated luminosity is ~ 28 inverse microbarn.

Inclusive Jpsi Nuclear Modification Factor (Raa) measured in Lead-Lead collisions at sqrt(sNN) = 2.76 TeV as a function of transverse momentum in 2.5 < y < 4 for the centrality range 0%-90%. Data have been collected in 2011 and the integrated luminosity is ~ 70 inverse microbarn.

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Two- and three-pion quantum statistics correlations in Pb-Pb collisions at $\sqrt{{s}_{NN}} =$ 2.76 TeV at the CERN Large Hadron Collider

The ALICE collaboration Abelev, Betty Bezverkhny ; Adam, Jaroslav ; Adamova, Dagmar ; et al.
Phys.Rev. C89 (2014) 024911, 2014.
Inspire Record 1262523 DOI 10.17182/hepdata.69985

Correlations induced by quantum statistics are sensitive to the spatio-temporal extent as well as dynamics of particle emitting sources in heavy-ion collisions. In addition, such correlations can be used to search for the presence of a coherent component of pion production. Two and three-pion correlations of same and mixed-charge are measured at low relative momentum to estimate the coherent fraction of charged pions in Pb-Pb collisions at $\sqrt{s_{\rm NN}}=2.76$ TeV at the LHC with ALICE. The genuine three-pion quantum statistics correlation is found to be suppressed relative to the two-pion correlation based on the assumption of fully chaotic pion emission. The suppression is observed to decrease with triplet momentum. The observed suppression at low triplet momentum may correspond to a coherent fraction in charged pion emission of 23% $\pm$ 8%.

19 data tables

C2 versus qinv for same-charge pions in six kT intervals. 0-5% centrality.

C2 versus qinv for mixed-charge pions in six kT intervals. 0-5% centrality.

C2 versus qinv for same-charge pions in six kT intervals. 45-50% centrality.

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$J/\psi$ production and nuclear effects in p-Pb collisions at $\sqrt{S_{NN}}$ = 5.02 TeV

The ALICE collaboration Abelev, Betty Bezverkhny ; Adam, Jaroslav ; Adamova, Dagmar ; et al.
JHEP 1402 (2014) 073, 2014.
Inspire Record 1251898 DOI 10.17182/hepdata.64892
6 data tables

The inclusive JPsi nuclear modification factor obtained in p-Pb and Pb-p collisions. The first uncertainty is statistical, the second one is the uncorrelated systematic uncertainty, while the third one is the partially correlated systematic uncertainty. The fourth is a global uncertainty common to p-Pb and Pb-p results.

The rapidity dependence of the inclusive JPsi production cross-section obtained in p-Pb and Pb-p collisions. The first uncertainty is statistical, the second one is the uncorrelated systematic uncertainty, while the third one is the partially correlated systematic uncertainty.

The rapidity dependence of the inclusive JPsi nuclear modification factor obtained in p-Pb and Pb-p collisions. The first uncertainty is statistical, the second one is the uncorrelated systematic uncertainty, while the third one is the partially correlated systematic uncertainty. The fourth is a global uncertainty common to p-Pb and Pb-p results.

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