电子自旋极化在laser辅助电子-质子散射中的作用
Effect of electron spin polarization in laser-assisted electron-proton scattering
摘要：
本文从理论上研究了圆极化电磁场作用下初始自旋极化电子的电子-质子散射。利用第一玻恩近似和缀饰电子的Dirac-Volkov态，借助自旋螺旋度形式，我们导出了微分截面的解析表达式。同时，应用了自旋翻转和自旋非翻转微分截面的概念。研究了电磁场对散射电子极化度的影响，考察了电子自旋极化的影响。我们发现，在散射过程中，电子的初始自旋会受到其动能的影响。这项工作是最近一篇论文的继续，在这篇论文中，我们研究了激光场存在下的非极化电子-质子散射（Dahiri等人，激光物理学18（2021）096001）。
英文摘要：
This work aims to study theoretically the electron-proton scattering for initially spin-polarized electrons in the presence of a circularly polarized electromagnetic field. Using the first Born approximation and the Dirac-Volkov states for dressed electrons, we derive an analytic expression for the differential cross-section with the help of the spin-helicity formalism. Meanwhile, a well-known concept of spin-flip and spin non-flip differential cross sections is applied. The influence of the electromagnetic field on the degree of polarization of the scattered electron is investigated, and the effect of electron spin polarization is examined. We found that the initial spin of the electron can be affected depending on its kinetic energy during the scattering process. This work is a continuation of a recent paper in which we studied the unpolarized electron-proton scattering in the presence of a laser field (Dahiri, et al., Laser Phys. Lett. 18 (2021) 096001).
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