The Weak Magnetic Photon Emission from Quark-gluon Plasma

作     者：SUN Jing’an YAN Li 孙静安;严力

作者机构：Institute of Modern PhysicsFudan UniversityShanghai 200433China Key Laboratory of Nuclear Physics and Ion-beam Application(MOE)Fudan UniversityShanghai 200433China 

出 版 物：《原子核物理评论》 (Nuclear Physics Review)

年 卷 期：2024年第41卷第1期

页      面：558-563页

学科分类：08[工学] 0827[工学-核科学与技术] 082701[工学-核能科学与工程] 

基　　金：国家自然科学基金资助项目(11975079) 

主　　题：heavy-ion collision the direct photon weak magnetic field elliptic flow 

摘      要：There must be electromagnetic fields created during high-energy heavy-ion *** the electromagnetic field may become weak with the evolution of the quark-gluon plasma(QGP),compared to the energy scales of the strong interaction,they are potentially important to some electromagnetic *** this work,we propose the coupled effect of the weak magnetic field and the longitudinal dynamics of the background medium for the first *** demonstrate that the induced photon spectrum can be highly azimuthally anisotropic when the quarkgluon plasma is in the presence of a weak external magnetic *** the other hand,the weak magnetic photon emission from quark-gluon plasma only leads to a small correction to the photon production *** hydrodynamic evolution with a tilted fireball configuration,the experimentally measured direct photon elliptic flow is well ***,the used time-averaged magnetic field in the hydrodynamic stage is found no larger than a few percent of the pion mass square.