Quark Number Susceptibility around the Chiral Critical End Point
JIANG Yu1,4 , HOU Feng-Yao2,4 , LUO Cui-Bai3 , ZONG Hong-Shi3,4,5
1 Center for Statistical and Theoretical Condensed Matter Physics, Zhejiang Normal University, Jinhua 3210042 Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 1001903 Department of Physics, Nanjing University, Nanjing 2100934 State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 1001905 Joint Center for Particle, Nuclear Physics and Cosmology, Nanjing 210093
Abstract ：We calculate the quark number susceptibility (QNS) around the chiral critical end point (CEP). The CEP is found to be located at (μc ,Tc ) = (80 MeV, 148 MeV) where μc and Tc are the critical chemical potential and temperature, respectively. The QNS is found to have the highest and sharpest peak at the CEP. It is also found that, when the chemical potential μ is in the range of 60 MeV ≤μ≤ 110 MeV, the QNS near the transition temperature is larger than the free field result, which indicates that the space-like damping mode dominates the degree of freedom of motion near the CEP.
出版日期: 2015-01-20
:
12.38.Mh
(Quark-gluon plasma)
12.39.-x
(Phenomenological quark models)
25.75.Nq
(Quark deconfinement, quark-gluon plasma production, and phase transitions)
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2015, Vol. 32 
