Chemical freeze-out parameters via a nonperturbative QCD approach

被引：1

作者：

Lu, Yi ^{[1
,2
,3
]}

Chen, Muyang ^{[4
]}

Bai, Zhan ^{[1
,2
,3
,7
]}

Gao, Fei ^{[5
]}

Yu-xin Liu ^{[1
,2
,3
,6
]}

机构：

[1] Peking Univ, Dept Phys, Beijing 100871, Peoples R China

[2] Peking Univ, State Key Lab Nucl Phys & Technol, Beijing 100871, Peoples R China

[3] Collaborat Innovat Ctr Quantum Matter, Beijing 100871, Peoples R China

[4] Hunan Normal Univ, Dept Phys, Changsha 410081, Peoples R China

[5] Heidelberg Univ, Inst Theoret Phys, Philosophenweg 16, D-69120 Heidelberg, Germany

[6] Peking Univ, Ctr High Energy Phys, Beijing 100871, Peoples R China

[7] Chinese Acad Sci, Inst Theoret Phys, Beijing 100081, Peoples R China

来源：

PHYSICAL REVIEW D | 2022年 / 105卷 / 03期

基金：

中国国家自然科学基金;

关键词：

DYSON-SCHWINGER EQUATIONS; PHASE-DIAGRAM; HADRON-PRODUCTION; CRITICAL-POINT; COLLISIONS; MODEL; DECONFINEMENT; TEMPERATURE;

D O I：

10.1103/PhysRevD.105.034012

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

By analyzing the calculated baryon number susceptibility ratios chi(B)(1)/chi(B)(2) and chi(B)(3)/chi(B)(1) in a two-flavor system via the Dyson-Schwinger equation approach of QCD, we determine the chemical freeze-out temperature and baryon chemical potential in cases of both thermodynamic limit and finite size. We calculate the center-of-mass energy dependence of the chi(B)(4)/chi(B)(2)(kappa sigma(2)) at the freeze-out line and find an excellent agreement with experimental data when taking into account the finite size effect. Our calculations indicate that the kappa sigma(2) exhibits a nonmonotonic behavior in the lower collision energy region. We also predict that the collision energy dependence of chi(B)(6)/chi(B)(2) is nonmonotonic.

引用

页数：9

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