Specific heat and its high-order moments in relativistic heavy-ion collisions from a multiphase transport model

被引：4
作者：
Cao, Ru-Xin [1 ,2 ,3 ]
Zhang, Song [2 ,4 ,5 ]
Ma, Yu-Gang [2 ,4 ,5 ]
机构：
[1] Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China
[2] Fudan Univ, Inst Modern Phys, Key Lab Nucl Phys & Ion Beam Applicat MOE, Shanghai 200433, Peoples R China
[3] Univ Chinese Acad Sci, Sch Nucl Sci & Technol, Beijing 100049, Peoples R China
[4] Shanghai Res Ctr Theoret Nucl Phys, NSFC, Shanghai 200438, Peoples R China
[5] Fudan Univ, Shanghai 200438, Peoples R China
来源：
PHYSICAL REVIEW C | 2022年 / 106卷 / 01期
基金：
中国国家自然科学基金; 国家重点研发计划;
关键词：
TEMPERATURE-FLUCTUATION; PHASE-TRANSITION; CAPACITY; PARTON; MATTER;
D O I：
10.1103/PhysRevC.106.014910
中图分类号：
O57 [原子核物理学、高能物理学];
学科分类号：
070202 ;
摘要：
Energy dependence of specific heat extracted from temperature fluctuation of Au + Au collisions at ???sNN = 7.7 to 200 GeV was investigated by using a multiphase transport (AMPT) model. The results were compared with those from other models and some differences at low ???sNN were found. To explain the above differences and describe the properties of the hot dense matter at low ???sNN, a new quantity Cv* was derived for describing specific heat in heavy-ion collisions. It was found that, by using Cv* together with its high-order moments (skewness and kurtosis), thermal properties of the hot dense matter can be described and different thermal properties with or without parton process can be clearly distinguished. The proposed observable provides a way to learn the property of QCD matter in heavy-ion collisions.
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页数：10
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