Critical behavior of higher cumulants of order parameter in the 3D-Ising universality class  

作　　者：陈丽珠 潘雪 陈晓松 吴元芳 

机构地区：[1]Institute of Particle Physics, Central China Normal University [2]Institute of Theoretial Physics, Chinese Academy of Sciences [3]Key Laboratory of Quark & Lepton Physics (Central China Normal University), Ministry of Education

出　　处：《Chinese Physics C》2012年第8期727-732,共6页中国物理C（英文版）

基　　金：Supported by National Natural Science Foundation of China(10835005);MOE of China(IRT0624,B08033)

摘　　要：QCD deconfinement phase transition is supposed to be the same universality class as the 3D-Ising model. According to the universality of critical behavior, the Binder-like ratios and ratios of higher cumulants of order parameter near the critical temperature in the 3D-Ising model are studied. The Binder-like ratio is shown to be a step function of temperature. The critical point is the intersection of the ratios of different system sizes between two platforms. The normalized cumulant ratios, like the Skewness and Kurtosis, do not diverge with correlation length, contrary to the corresponding cumulants. Possible applications of these characters in locating critical point in relativistic heavy ion collisions are discussed.QCD deconfinement phase transition is supposed to be the same universality class as the 3D-Ising model. According to the universality of critical behavior, the Binder-like ratios and ratios of higher cumulants of order parameter near the critical temperature in the 3D-Ising model are studied. The Binder-like ratio is shown to be a step function of temperature. The critical point is the intersection of the ratios of different system sizes between two platforms. The normalized cumulant ratios, like the Skewness and Kurtosis, do not diverge with correlation length, contrary to the corresponding cumulants. Possible applications of these characters in locating critical point in relativistic heavy ion collisions are discussed.

关 键 词：QCD deconfinement phase transition critical point 3D-Ising model Binder-like ratios ratios of higher cumulants 

分 类 号：O572.243[理学—粒子物理与原子核物理]