标题： 相对论重离子碰撞中的束缚-自由电子-正电子对产生 显示英文标题

标题： Bound-Free Electron-Positron Pair Production in Relativistic Heavy-Ion Collisions

摘要： 考虑了相对论重离子碰撞中的束缚态-自由态电子-正电子对产生。特别是，计算了伴随电子同时被捕获到其中一个离子的1s基态的电子-正电子对产生的截面，以及与相对论重离子对撞机（RHIC）和大型强子对撞机（LHC）相关的能量下的截面。在微扰论框架下，我们应用蒙特卡罗积分技术，利用达尔文波函数描述电子束缚态，利用索末菲-毛厄波函数描述正电子连续态，以计算最低阶费曼图振幅。计算尤其针对100 GeV/核子的Au+Au碰撞和3400 GeV/核子的Pb+Pb碰撞进行了。 显示英文摘要

摘要： The bound-free electron-positron pair production is considered for relativistic heavy ion collisions. In particular, cross sections are calculated for the pair production with the simultaneous capture of the electron into the 1s ground state of one of the ions and for energies that are relevant for the Relativistic Heavy Ion Collider (RHIC) and the Large Hadron Colliders (LHC). In the framework of perturbation theory, we applied Monte-Carlo integration techniques to compute the lowest-order Feynman diagrams amplitudes by using Darwin wave functions for the bound states of the elec- trons and Sommerfeld-Maue wave functions for the continuum states of the positrons. Calculations were performed especially for the collision of Au + Au at 100 GeV/nucleon and Pb + Pb at 3400 GeV/nucleon.