AI 中文总结
研究在强激光场中电子与正电子碰撞接近阈值时μ子对产生，关注略低于阈值情况，通过多光子吸收克服能隙，计算过程截面，探讨其与能隙和激光参数非微扰依赖，确定三种相互作用 regime，发现类似施温格效应的指数依赖。
AI 中文摘要
在强场量子电动力学框架内，我们研究了在激光辅助的电子与正电子碰撞中μ子 - 反μ子对的产生，其质心能量接近该过程的阈值。我们关注入射碰撞能量略低于阈值的情况，此时相关的能隙必须通过在碰撞发生时从所施加高强度激光场的多光子吸收来克服。我们计算了该过程的截面，并讨论了其对能隙和激光参数的非微扰依赖性。确定了三种定性不同的相互作用 regime，其中激光场的影响要么具有经典性质，要么具有完全量子性质。在后一种情况下，发现截面与碰撞参数呈指数依赖关系，这类似于施温格效应。
英文摘要
Within the framework of strong-field quantum electrodynamics, we study the creation of muon-antimuon pairs in laser-assisted collisions of electrons with positrons, whose center-of-mass energy is close to the threshold of the process. Our focus lies on incident collision energies slightly below the threshold, where the associated energy gap has to be overcome by multiphoton absorption from the applied high-intensity laser field while the collision occurs. We calculate the cross section of the process and discuss its nonperturbative dependencies on the energy gap and the laser parameters. Three qualitatively different interaction regimes are identified, where the influence of the laser field either has a classical or fully quantum nature. In the latter case, an exponential dependence of the cross section on the collision parameters is found, which resembles the Schwinger effect.
Comments8 pages, 7 figures
