摘要
The chiral phase transition and equation of state are studied within a novel self-consistent mean-field approximation of the two-flavor Nambu-Jona-Lasinio model.In this newly developed model,modifications to the chemical μand chiral chemical μ5 potentials are naturally included by introducing vector and axial-vector channels from Fierz-transformed Lagrangian to the standard Lagrangian.In the proper-time scheme,the chiral phase transition is a crossover in the T-μ plane.However,when μ5 is incorporated,our study demonstrates that a first order phase transition may emerge.Furthermore,the chiral imbalance will soften the equation of state of quark matter.The mass-radius relationship and tidal deformability of quark stars are calculated.The maximum mass and radius decrease as μ5 increases.Our study also indicates that the vector and axial-vector channels exhibit an opposite influence on the equation of state.
作者
Qing-Wu Wang
Chao Shi
Hong-Shi Zong
王庆武;史潮;宗红石(College of Physics,Sichuan University,Chengdu 610064,China;Department of nuclear science and technology,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China;Department of Physics,Nanjing University,Nanjing 210093,China;Department of Physics,Anhui Normal University,Wuhu,Anhui 241000,China;Nanjing Institute of Proton Source Technology,Nanjing 210046,China)
基金
Supported by the National Natural Science Foundation of China(11475085,11535005,11690030,11873030,11905104)
the Fostering Program in Disciplines Possessing Novel Features for Natural Science(2020SCUNL209)。
