Longitudinal dynamics from hydrodynamics with an order parameter

作     者：林树 周舸争 Shu Lin;Gezheng Zhou

作者机构：School of Physics and AstronomySun Yat-Sen UniversityZhuhai 519082China 

出 版 物：《Chinese Physics C》 (中国物理C（英文版）)

年 卷 期：2021年第45卷第4期

页      面：265-272页

核心收录：

学科分类：0709[理学-地质学] 080704[工学-流体机械及工程] 080103[工学-流体力学] 08[工学] 0708[理学-地球物理学] 0807[工学-动力工程及工程热物理] 0804[工学-仪器科学与技术] 0827[工学-核科学与技术] 0703[理学-化学] 0704[理学-天文学] 0702[理学-物理学] 0801[工学-力学（可授工学、理学学位）] 

基　　金：in part Supported by NSFC(11675274 11735007) 

主　　题：relativistic hydrodynamics linear sigma model chiral phase transition heavy ion collisions equilibration 

摘      要：We studied coupled dynamics of hydrodynamic fields and order parameter in the presence of nontrivial longitudinal flow using the chiral fluid dynamics *** found that longitudinal expansion provides an effective relaxation for the order parameter,which equilibrates in an oscillatory *** oscillations are also visible in hydrodynamic degrees of freedom through coupled *** oscillations are reduced when dissipation is *** also found that the quark density,which initially peaked at the boundary of the boost invariant region,evolves toward forward rapidity with the peak velocity correlated with the velocity of longitudinal *** peak broadens during this *** corresponding chemical potential rises due to simultaneous decrease of density and *** compared the cases with and without dissipation for the order parameter and also the standard hydrodynamics without order *** found that the corresponding effects on temperature and chemical potential can be understood from the conservation laws and different speeds of equilibration of the order parameter in the three cases.