标题： 部分波分析在多光子对产生中的应用 显示英文标题

标题： Application of partial wave analysis in multiphoton pair production

摘要： 电子-正电子对在极化场的多光子 regime 中被研究。 部分波分析可以通过结合$CP$守恒来揭示动量谱结构，并确定多光子环的谷/峰位置。 此外，考虑到部分波分析中产生的粒子的自旋态，也可以从多光子环中识别与谷/峰相关的粒子轨道角动量。 发现通过这种近似解析处理得到的角分布结果与 Dirac-Heisenberg-Wigner 形式主义的结果是一致的。 目前的结果有助于理解动量谱中的角动量信息，同时也对揭示谷附近涡旋结构具有意义。 显示英文摘要

摘要： Electron-positron pair production is investigated in the multiphoton regime under polarized fields. Partial wave analysis can be applied to reveal the momentum spectral structure and identify the positions of valleys/peaks of the multiphoton rings by combining with $CP$ conservation. Moreover, considering the spin states of created pairs in partial wave analysis, the particle orbital angular momentum associated with the valleys/peaks can also be identified from multiphoton rings. It is found that the results for angular distribution by this approximate analytical treatment and by the Dirac-Heisenberg-Wigner formalism are consistent with each other. The present results are helpful for understanding the angular momentum information in momentum spectra, and they also have an implication for revealing the vortex structure near the valleys.