Higher order fluctuations and correlations of conserved charges from lattice QCD

被引：155

作者：

Borsanyi, Szabolcs ^{[1
]}

Fodor, Zoltan ^{[1
,2
,3
]}

Guenther, Jana N. ^{[1
,4
]}

Katz, Sandor K. ^{[4
]}

Pasztor, Attila ^{[1
]}

Portillo, Israel ^{[5
]}

Ratti, Claudia ^{[5
]}

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

机构：

[1] Univ Wuppertal, Dept Phys, D-42097 Wuppertal, Germany

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

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

[4] Univ Regensburg, Dept Phys, D-93053 Regensburg, Germany

[5] Univ Houston, Dept Phys, Houston, TX 77204 USA

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2018年 / 10期

基金：

美国国家科学基金会;

关键词：

Lattice QCD; Phase Diagram of QCD; Quark-Gluon Plasma; FINITE-DENSITY; PHASE-DIAGRAM; TRANSITION; TEMPERATURE; COLLISIONS; MODEL;

D O I：

10.1007/JHEP10(2018)205

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 calculate several diagonal and non-diagonal fluctuations of conserved charges in a system of 2+1+1 quark flavors with physical masses, on a lattice with size 48(3) x 12. Higher order fluctuations at (B) = 0 are obtained as derivatives of the lower order ones, simulated at imaginary chemical potential. From these correlations and fluctuations we construct ratios of net-baryon number cumulants as functions of temperature and chemical potential, which satisfy the experimental conditions of strangeness neutrality and proton/baryon ratio. Our results qualitatively explain the behavior of the measured cumulant ratios by the STAR collaboration.

引用

页数：29

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