Electromagnetic fields in ultra-peripheral relativistic heavy-ion collisions  

作　　者：Jie Zhao Jin-Hui Chen Xu-Guang Huang Yu-Gang Ma 

机构地区：[1]Key Laboratory of Nuclear Physics and Ion-beam Application(MOE),Institute of Modern Physics,Fudan University,Shanghai 200433,China [2]Shanghai Research Center for Theoretical Nuclear Physics,NSFC and Fudan University,Shanghai 200438,China [3]Physics Department and Center for Particle Physics and Field Theory,Fudan University,Shanghai 200438,China

出　　处：《Nuclear Science and Techniques》2024年第2期103-109,共7页核技术（英文）

基　　金：This work is supported in part by the National Key Research and Development Program of China(Nos.2022YFA1604900);the Guangdong Major Project of Basic and Applied Basic Research(No.2020B0301030008);the National Natural Science Foundation of China(Nos.12275053,12025501,11890710,11890714,12147101,12075061,and 12225502);the Strategic Priority Research Program of Chinese Academy of Sciences(No.XDB34030000);Shanghai National Science Foundation(No.20ZR1404100);STCSM(No.23590780100).

摘　　要：Ultra-peripheral heavy-ion collisions(UPCs)offer unique opportunities to study processes under strong electromagnetic fields.In these collisions,highly charged fast-moving ions carry strong electromagnetic fields that can be effectively treated as photon fluxes.The exchange of photons can induce photonuclear and two-photon interactions and excite ions.This excitation of the ions results in Coulomb dissociation with the emission of photons,neutrons,and other particles.Additionally,the electromagnetic fields generated by the ions can be sufficiently strong to enforce mutual interactions between the two colliding ions.Consequently,the two colliding ions experience an electromagnetic force that pushes them in opposite directions,causing a back-to-back correlation in the emitted neutrons.Using a Monte Carlo simulation,we qualitatively demonstrate that the above electromagnetic effect is large enough to be observed in UPCs,which would provide a clear means to study strong electromagnetic fields and their effects.

关 键 词：Electromagnetic fields Neutrons Ultra-peripheral relativistic heavy-ion collisions(UPC) 

分 类 号：O571.6[理学—粒子物理与原子核物理]