手征化学势下的手征相变研究  

Study of chiral phase transition under chiral chemical potential

作　　者：陈建兴[1] 李冬 魏颖 CHEN Jianxing;LI Dong;WEI Ying(School of Physics and Electronic Technology,Liaoning Normal University,Dalian 116029,China)

机构地区：[1]辽宁师范大学物理与电子技术学院,辽宁大连116029

出　　处：《辽宁师范大学学报（自然科学版）》2023年第2期169-176,共8页Journal of Liaoning Normal University:Natural Science Edition

基　　金：辽宁师范大学理论物理学术交流和人才培养建设平台项目(12047570)。

摘　　要：利用两味道的NJL模型,研究手征化学势对手征相变临界点的影响,并考虑了均匀磁场的情况.通过对质量隙方程的求解,得出夸克的有效质量随温度等的变化情况,确定相变临界点.在研究过程中采取三维动量截断的正规化处理方式.研究表明:随着手征化学势的不断增大,临界化学势不断减小,而临界温度先增加后减小,这反映了手征化学势对手征对称性破缺的催化和逆催化效应;而磁场的增强会对手征对称性破缺起到强化作用,导致有效质量增大,临界化学势、临界手征化学势以及临界温度也会随之增大.此外,也简单地讨论了有限体积效应.The influence of chiral chemical potential on the critical point of chiral phase transition is studied by using the two-flavor NJL model,and the uniform magnetic field is considered.By solving the mass gap equation,the variation of the effective mass of quarks with temperature is obtained,and the critical point of phase transition is determined.In the process of research,the three-dimensional momentum truncation normalization method is adopted.The results shows that with the increasing of the chiral chemical potential,the critical chemical potential decreases,and the critical temperature first increases and then decreases,which reflects the catalytic and inverse catalytic effects of the chiral chemical potential.Moreover,the enhancement of magnetic field will strengthen the breaking of chiral symmetry,leading to the increase of effective mass and the increase of critical chemical potential,critical chiral chemical potential and critical temperature.In addition,we also briefly discuss the finite volume effect.

关 键 词：NJL模型 手征化学势 手征相变 磁场 

分 类 号：O572.33[理学—粒子物理与原子核物理]