Topological susceptibility near T_c in SU(3) gauge theory

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• 作者：Guang-Yi Xiong^a ; ^{xionggy@zju.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; Jian-Bo Zhang^a ; Ying Chen^b ; ^c ; Chuan Liu^d ; ^e ; Yu-Bin Liu^f ; Jian-Ping Ma^g
• 关键词：Topological charge ; Finite temperature ; Topological susceptibility ; Topological cumulant
• 刊名：Physics Letters B
• 出版年：2016
• 出版时间：10 January 2016
• 年：2016
• 卷：752
• 期：Complete
• 页码：34-39
• 全文大小：453 K

文摘

Topological charge susceptibility w the MathML source">χ_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 w the MathML source">χ_t with values decreasing from w the MathML source">(188(1) MeV)⁴ to w the MathML source">(67(3) MeV)⁴ as the temperature increased from zero temperature to w the MathML source">1.9T_c which demonstrates the existence of topological excitations far above w the MathML source">T_c. The 4th order cumulant w the MathML source">c₄ of topological charge, as well as the ratio w the MathML source">c₄/χ_t is also investigated. Results of w the MathML source">c₄ show step-like behavior near w the MathML source">T_c while the ratio at high temperature agrees with the value as predicted by the diluted instanton gas model.