QCD equation of state at nonzero chemical potential: continuum results with physical quark masses at order μ2

被引：229

作者：

Borsanyi, Sz ^{[1
]}

Endrodi, G. ^{[2
]}

Fodor, Z. ^{[1
,3
,4
]}

Katz, S. D. ^{[3
]}

Krieg, S. ^{[1
,4
]}

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

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

机构：

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

[2] Univ Regensburg, Inst Theoret Phys, D-93040 Regensburg, Germany

[3] Eotvos Lorand Univ, H-1117 Budapest, Hungary

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

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

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

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2012年 / 08期

基金：

欧洲研究理事会;

关键词：

Lattice QCD; Lattice Quantum Field Theory; 2 FLAVOR QCD; TRANSITION-TEMPERATURE; LATTICE QCD; FREEZE-OUT; FLOW;

D O I：

10.1007/JHEP08(2012)053

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

We determine the equation of state of QCD for nonzero chemical potentials via a Taylor expansion of the pressure. The results are obtained for N-f = 2 + 1 flavors of quarks with physical masses, on various lattice spacings. We present results for the pressure, interaction measure, energy density, entropy density, and the speed of sound for small chemical potentials. At low temperatures we compare our results with the Hadron Resonance Gas model. We also express our observables along trajectories of constant entropy over particle number. A simple parameterization is given (the Matlab/Octave script parameterization.m, submitted to the arXiv along with the paper), which can be used to reconstruct the observables as functions of T and mu, or as functions of T and S/N.

引用

页数：16

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