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

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.