Correlations of conserved charges and QCD phase structure

• 作者: Rui Wen Wei-jie Fu
• 来源期刊: 中国物理C（英文版）
• 年，卷（期）: 2021,（4）
• 所属期刊栏目: NUCLEAR PHYSICS
• 页码范围: 380-393
• 页数: 14页
• 语种: 英文
• DOI: 10.1088/1674-1137/abe199

摘要

Correlations of conserved charges,i.e.,the baryon number,electric charge,and strangeness,are calculated at finite temperature and chemical potentials up to the fourth order.The calculations are done in a 2+1 flavor low energy effective theory,in which the quantum and thermal fluctuations are encoded through the evolution of flow equations within the functional renormalization group approach.Strangeness neutrality and a fixed ratio of the electric charge to the baryon number density are implemented throughout the computation.We find that higher-order correlations incorporate more sensitive critical dynamics than the quadratic ones.In addition,a non-monotonic dependence of the fourth-order correlations between the baryon number and strangeness,i.e.,-xBS31/xS2 and xBS22/xS2,on the collision energy is also observed.