Nonextensive effects on QCD chiral phase transition with a chiral chemical potential

被引：1
作者：
Zhao, Ya-Peng [1 ]
Zuo, Shu-Yu [2 ]
Li, Cheng-Ming [3 ]
机构：
[1] Henan Urban Construct Univ, Sch Math & Phys, Pingdingshan 467036, Peoples R China
[2] Henan Univ Technol, Coll Sci, Zhengzhou 450000, Peoples R China
[3] Zhengzhou Univ, Sch Phys & Microelect, Zhengzhou 450001, Peoples R China
来源：
CHINESE PHYSICS C | 2022年 / 46卷 / 10期
基金：
中国博士后科学基金; 中国国家自然科学基金;
关键词：
nonextensive statistics; Polyakov-Nambu-Jona-Lasinio model; QCD phase diagram; chiral chemical potential; EFFECTIVE MODEL; NJL-MODEL; ALGEBRA; DIAGRAM; MATTER;
D O I：
10.1088/1674-1137/ac5dbc
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：
In this study, we investigate the QCD chiral phase diagram in the presence of a chiral chemical potential mu(5) based on nonextensive statistical mechanics. A feature of this new statistic is a dimensionless nonextensivity parameter q, which summarizes all possible effects violating the assumptions of Boltzmann-Gibbs (BG) statistics (when q -> 1, it returns to the BG case). Within the nonextensive Polyakov-Nambu-Jona-Lasinio model, we find that as increases, the critical end point (CEP) in the T - mu plane continues to CEP5 in the T - mu(5) plane, and nonextensive effects have a significant impact on the evolution from the CEP to CEP5. Generally, with an increase in q, both the CEP and CEP5 move in the direction of a lower temperature T and larger chemical potential mu (mu(5)). In addition, we find that chiral charge density generally increases with T, mu, mu(5), and q. Our study may provide useful hints about lattice QCD and relativistic heavy-ion collision experiments.
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页数：9
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