Second to tenth order susceptibilities of conserved charges within a modified Nambu-Jona-Lasinio model  

作　　者：Wenkai Fan Xiaofeng Luo Hongshi Zong 范文凯;罗晓峰;宗红石(Kuang Yaming Honors School, Nanjing University;Key Laboratory of Quark &Lepton Physics (MOE) and Institute of Particle Physics, Central China Normal University;Department of Physics, Nanjing University)

机构地区：[1]Kuang Yaming Honors School, Nanjing University [2]Key Laboratory of Quark &Lepton Physics (MOE) and Institute of Particle Physics, Central China Normal University [3]Department of Physics, Nanjing University

出　　处：《Chinese Physics C》2019年第5期99-106,共8页中国物理C（英文版）

基　　金：Supported in part by the MoST of China 973-Project(2015CB856901);the National Natural Science Foundation of China(11475085,11535005,11690030,11575069,11221504,11890711,11861131009);the Fundamental Research Funds for the Central Universities(020414380074,CCNU19QN054)

摘　　要：We discuss the sign and energy dependence of second to tenth order susceptibilities of the baryon number,charge number, and strangeness for the analysis of critical conditions in heavy ion collisions in the LHC and RHIC by applying a modified Nambu-Jona-Lasinio model. This model is fitted to the quark condensate of the lattice QCD result at finite temperature and zero baryon chemical potential. The presence of a critical point made these susceptibilities deviate considerably from a Hadron-Resonance-Gas model that shows no criticality. The sign, magnitude, and energy dependence of these higher order fluctuations hint towards the existence and location of a critical point that could be discovered in future heavy ion collision experiments.We discuss the sign and energy dependence of second to tenth order susceptibilities of the baryon number,charge number, and strangeness for the analysis of critical conditions in heavy ion collisions in the LHC and RHIC by applying a modified Nambu-Jona-Lasinio model. This model is fitted to the quark condensate of the lattice QCD result at finite temperature and zero baryon chemical potential. The presence of a critical point made these susceptibilities deviate considerably from a Hadron-Resonance-Gas model that shows no criticality. The sign, magnitude, and energy dependence of these higher order fluctuations hint towards the existence and location of a critical point that could be discovered in future heavy ion collision experiments.

关 键 词：QCD critical point NJL model HEAVY-ION COLLISIONS QCD phase DIAGRAM 

分 类 号：O4[理学—物理]