Statistical method in quark combination model  

作　　者：Yang-Guang Yang Jun Song Feng-Lan Shao Zuo-Tang Liang Qun Wang 杨阳光;宋军;邵凤兰;梁作堂;王群(Department of Modern Physics,University of Science and Technology of China,Hefei 230026,China;Department of Physics,Jining University,Shandong 273155,China;School of Physics and Engineering,Qufu Normal University,Shandong 273165,China;Institute of Frontier and Interdisciplinary Science,Key Laboratory of Particle Physics and Particle Irradiation(MOE),Shandong University,Qingdao 266237,China)

机构地区：[1]Department of Modern Physics,University of Science and Technology of China,Hefei 230026,China [2]Department of Physics,Jining University,Shandong 273155,China [3]School of Physics and Engineering,Qufu Normal University,Shandong 273165,China [4]Institute of Frontier and Interdisciplinary Science,Key Laboratory of Particle Physics and Particle Irradiation(MOE),Shandong University,Qingdao 266237,China

出　　处：《Chinese Physics C》2020年第3期80-95,共16页中国物理C（英文版）

基　　金：Supported by National Natural Science Foundation of China(11535012,11890713,11575100);the 973 program(2015CB856902);the Key Research Program of the Chinese Academy of Sciences(XDPB09);Shandong Province Natural Science Foundation(ZR2019YQ06,ZR2019MA053)

摘　　要：We present a new method for solving the probability distribution for baryons,antibaryons,and mesons at the hadronization of the constituent quark and antiquark system.The hadronization is governed by the quark combination rule in the quark combination model developed by the Shandong Group.We employ the method of the generating function to derive the outcome of the quark combination rule,which is significantly simpler and easier to generalize than the original method.Furthermore,we use the formula of the quark combination rule and its generalization to study the property of the multiplicity distribution of net-protons.Taking a naive case of quark number fluctuations and correlations at hadronization,we calculate ratios of multiplicity cumulants of final-state net-protons and discuss the potential applicability of the quark combination model by studying hadronic multiplicity fluctuations and the underlying phase transition property in relativistic heavy-ion collisions.We present a new method for solving the probability distribution for baryons, antibaryons, and mesons at the hadronization of the constituent quark and antiquark system. The hadronization is governed by the quark combination rule in the quark combination model developed by the Shandong Group. We employ the method of the generating function to derive the outcome of the quark combination rule, which is significantly simpler and easier to generalize than the original method. Furthermore, we use the formula of the quark combination rule and its generalization to study the property of the multiplicity distribution of net-protons. Taking a naive case of quark number fluctuations and correlations at hadronization, we calculate ratios of multiplicity cumulants of final-state net-protons and discuss the potential applicability of the quark combination model by studying hadronic multiplicity fluctuations and the underlying phase transition property in relativistic heavy-ion collisions.

关 键 词：HADRONIZATION quark combination model particle fluctuation 

分 类 号：O572.33[理学—粒子物理与原子核物理]