报告题目：Phase transition in three flavor QCDwith background magnetic field

报告人：Dr.AkioTomiya(富谷昭夫)

工作单位：RIKEN-BNL, USA

报告时间: 2019年09月24日15：00

报告地点：中心校区物理楼345室

摘要：In this talk, I introduce a phase transition in threeflavor QCD under strong magnetic field. We investigate the order of thistransition using unimproved and highly improved staggered quarks (HISQ). Wediscuss the dependences of chiral condensates and susceptibilities and thePolyakov loop on the volume, quark mass and the magnitude of magnetic field.The lattice simulations are performed with several spatial sizes and a fixedtemporal size Nt= 4 (Nt=6 for HISQ). The value of the quark masses are chosensuch that the system undergoes crossover with zero magnetic field in bothformulations. We find that for the standard staggered quarks, the quark chiralcondensate undergoes magnetic catalysis in the whole temperature region and thephase transition becomes stronger as the magnetic field increases. The Bindercumulant supports this observation. For the HISQ action, the inverse magneticcatalysis is observed in the critical temperature region and the phasetransition tends to become stronger as the magnetic field increases. However,the Binder cumulant does not shows any criticality even for our strongestmagnetic field.

主办单位：吉林大学物理学院

吉林大学理论物理中心