相对论重离子碰撞中背景磁场的计算与分析  

Calculation and analysis of background magnetic fields in relativistic heavy-ion collisions

作　　者：艾鑫[1] 冯笙琴[1] 钟洋[1] 

机构地区：[1]三峡大学理学院,湖北宜昌443002

出　　处：《大学物理》2017年第6期15-20,共6页College Physics

基　　金：三峡大学教学研究重点项目(2016031);国家自然科学基金(11475068)资助

摘　　要：通过洛伦兹变换推导了相对论匀速运动点电荷磁场公式.在此基础上得到了相对论重离子碰撞中背景磁场的计算公式,并考虑原子核在纵向的厚度.对RHIC能区Au-Au碰撞和LHC能区Pb-Pb碰撞所产生的磁场进行了数值计算,着重讨论了原点磁场的能量依赖性质并给出了直观的定性解释.The magnetic field formula of a point charge in relativistic form is derived by using the Lorentz transformation. On this basis,we estimate the background magnetic field in relativistic heavy-ion collisions by taking consideration in the longitudinal thickness of nucleus. The numerical calculations of Au-Au collisions in RHIC energy regions and Pb-Pb collisions in LHC energy regions are carried out.Then,we discuss mainly the energy dependence of the magnetic field at original point and give an intuitive,qualitative theory explanation.

关 键 词：相对论重离子碰撞 洛伦兹变换 背景磁场 

分 类 号：O562.5[理学—原子与分子物理]