Influences of magnetic field on the coexistence of diquark and chiral condensates in the Nambu-Jona-Lasinio model with axial anomaly  

作　　者：Xiao-Bing Zhang Fu-Ping Peng Yun-Ben Wu Yi Zhang 张小兵;彭富平;吴云奔;张一(School of Physics,Nankai University,Tianjin 300071,China;Department of Physics,Shanghai Normal University,Shanghai 200230,China)

机构地区：[1]School of Physics,Nankai University,Tianjin 300071,China [2]Department of Physics,Shanghai Normal University,Shanghai 200230,China

出　　处：《Communications in Theoretical Physics》2020年第11期65-73,共9页理论物理通讯（英文版）

基　　金：supported by the National Natural Science Foundation of China(NSFC)under Contract No.10875058。

摘　　要：In this paper,we study the influences of magnetic fields on the coexistence of diquark and chiral condensates in an extended Nambu-Jona-Lasinio model with QCD axial anomaly,as it relates to color-flavor-locked quark matter.Due to the coupling of rotated-charged quarks to magneticfields,diquark condensates become split,and the coexistence region is thus superseded in favor of a specific diquark Bose-Einstein condensation(BEC),denoted as the BECIphase.For strong magnetic fields,we find that the BECItransition is pushed to larger quark chemical potentials.The effect of magnetic catalysis tends to disrupt the BEC-BCS(Bardeen-Cooper-Schrieffer)crossover predicted in previous works.For intermediate fields,the effect of inverse magnetic catalysis is observed,and the axial-anomaly-induced phase structure is essentially unchanged.

关 键 词：Nambu-Jona-Lasinio model diquark Bose-Einstein condensation magnetic catalysis inverse magnetic catalysis axial-anomaly coexistence of diquark and chiral condensates magnetic field 

分 类 号：O441.4[理学—电磁学] O572.33[理学—物理]