Freeze-Out Parameters from Electric Charge and Baryon Number Fluctuations: Is There Consistency?

被引：135

作者：

Borsanyi, S. ^{[1
]}

Fodor, Z. ^{[1
,2
,3
]}

Katz, S. D. ^{[2
,4
]}

Krieg, S. ^{[1
,3
]}

Ratti, C. ^{[5
,6
]}

Szabo, K. K. ^{[1
,3
]}

机构：

[1] Berg Univ Wuppertal, Dept Phys, D-42119 Wuppertal, Germany

[2] Eotvos Lorand Univ, Inst Theoret Phys, H-1117 Budapest, Hungary

[3] Forschungszentrum Julich, Julich Supercomp Ctr, D-52425 Julich, Germany

[4] MTA ELTE Lendulet Lattice Gauge Theory Res Grp, H-1117 Budapest, Hungary

[5] Univ Turin, Dipartimento Fis, I-10125 Turin, Italy

[6] Ist Nazl Fis Nucl, Sez Torino, I-10125 Turin, Italy

来源：

PHYSICAL REVIEW LETTERS | 2014年 / 113卷 / 05期

关键词：

MULTIPLICITY DISTRIBUTIONS; NET-CHARGE; COLLISIONS; STAR; MOMENTS;

D O I：

10.1103/PhysRevLett.113.052301

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Recent results for moments of multiplicity distributions of net protons and net-electric charge from the STAR Collaboration are compared to lattice QCD results for higher order fluctuations of baryon number and electric charge by theWuppertal-Budapest Collaboration, with the purpose of extracting the freeze-out temperature and chemical potential. All lattice simulations are performed for a system of 2 + 1 dynamical quark flavors, at the physical mass for light and strange quarks; all results are continuum extrapolated. We show that it is possible to extract an upper value for the freeze-out temperature, as well as precise baryochemical potential values corresponding to the four highest collision energies of the experimental beam energy scan. Consistency between the freeze-out parameters obtained from baryon number and electric charge fluctuations is found. The freeze-out chemical potentials are now in agreement with the statistical hadronization model.

引用

页数：5

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