Topological susceptibility near Tc in SU(3) gauge theory

被引：8
|
作者：
Xiong, Guang-Yi [1 ]
Zhang, Jian-Bo [1 ]
Chen, Ying [2 ,3 ]
Liu, Chuan [4 ,5 ]
Liu, Yu-Bin [6 ]
Ma, Jian-Ping [7 ]
机构：
[1] Zhejiang Univ, Dept Phys, Hangzhou 310027, Peoples R China
[2] Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China
[3] Chinese Acad Sci, Theoret Ctr Sci Facil, Beijing 100049, Peoples R China
[4] Peking Univ, Sch Phys, Beijing 100871, Peoples R China
[5] Collaborat Innovat Ctr Quantum Matter, Beijing 100871, Peoples R China
[6] Nankai Univ, Sch Phys, Tianjin 300071, Peoples R China
[7] Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China
来源：
PHYSICS LETTERS B | 2016年 / 752卷
基金：
美国国家科学基金会;
关键词：
Topological charge; Finite temperature; Topological susceptibility; Topological cumulant; INSTANTONS; U(1); QCD;
D O I：
10.1016/j.physletb.2015.10.085
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Topological charge susceptibility chi(t) for pure gauge SU(3) theory at finite temperature is studied using anisotropic lattices. The over-improved stout-link smoothing method is utilized to calculate the topological charge. Near the phase transition point we find a rapid declining behavior for chi(t) with values decreasing from (188(1) MeV)(4) to (67(3) MeV)(4) as the temperature increased from zero temperature to 1.9T(c) which demonstrates the existence of topological excitations far above T-c. The 4th order cumulant c(4) of topological charge, as well as the ratio c4/chi(t) is also investigated. Results of c(4) show step-like behavior near T-c while the ratio at high temperature agrees with the value as predicted by the diluted instanton gas model. (C) 2015 The Authors. Published by Elsevier B.V.
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页码：34 / 39
页数：6
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