Net-proton probability distribution in heavy ion collisions

被引：45

作者：

Braun-Munzinger, P. ^{[1
,2
,3
,4
]}

Friman, B. ^{[2
]}

Karsch, F. ^{[5
,6
]}

Redlich, K. ^{[1
,7
]}

Skokov, V. ^{[2
,4
,5
]}

机构：

[1] GSI Darmstadt, ExtreMe Matter Inst EMMI, D-64291 Darmstadt, Germany

[2] GSI Helmholtzzentrum Schwerionenforsch, D-64291 Darmstadt, Germany

[3] Tech Univ Darmstadt, D-64289 Darmstadt, Germany

[4] Goethe Univ Frankfurt, Frankfurt Inst Adv Studies, Frankfurt, Germany

[5] Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA

[6] Univ Bielefeld, Fak Phys, D-33501 Bielefeld, Germany

[7] Univ Wroclaw, Inst Theoret Phys, PL-50204 Wroclaw, Poland

来源：

PHYSICAL REVIEW C | 2011年 / 84卷 / 06期

关键词：

QCD PHASE-TRANSITION; FREEZE-OUT; FLUCTUATIONS; LATTICE; MODEL;

D O I：

10.1103/PhysRevC.84.064911

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

We compute net-proton probability distributions in heavy ion collisions within the hadron resonance gas model. The model results are compared with data taken by the STAR Collaboration in Au-Au collisions at root s(NN) = 200 GeV for different centralities and for the central energy bin at root s(NN) = 39 GeV. We show that, in central Au-Au collisions at root s(NN) = 39 GeV, the measured distribution is consistent with the hadron resonance gas model but differs from the predictions of the model at root s(NN) = 200 GeV. At the highest energy, deviations from model results are smaller for peripheral collisions. We argue that such properties of probability distributions are expected if the freeze-out conditions probed by fluctuations are located close to the QCD crossover transition.

引用

页数：5

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