Xue Kun, Guo Ren-Tong, Wan Feng, Shaisultanov Rashid, Chen Yue-Yue, Xu Zhong-Feng, Ren Xue-Guang, Hatsagortsyan Karen Z, Keitel Christoph H, Li Jian-Xing
Ministry of Education Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Shaanxi Province Key Laboratory of Quantum Information and Quantum Optoelectronic Devices, School of Physics, Xi'an Jiaotong University, Xi'an 710049, China.
Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, Heidelberg 69117, Germany.
Fundam Res. 2021 Dec 2;2(4):539-545. doi: 10.1016/j.fmre.2021.11.022. eCollection 2022 Jul.
Generation of arbitrarily spin-polarized electron and positron beams has been investigated in the single-shot interaction of high-energy polarized -photons with an ultraintense asymmetric laser pulse via nonlinear Breit-Wheeler pair production. We develop a fully spin-resolved semi-classical Monte Carlo method to describe the pair creation and polarization. In the considered general setup, there are two sources of the polarization of created pairs: the spin angular momentum transfer from the polarized parent -photons, as well as the asymmetry and polarization of the driving laser field. This allows to develop a highly sensitive tool to control the polarization of created electrons and positrons. Thus, dense GeV lepton beams with average polarization degree up to about , adjustable continuously between the transverse and longitudinal components, can be obtained by our all-optical method with currently achievable laser facilities, which could find an application as injectors of the polarized collider to search for new physics beyond the Standard Model.
通过非线性 Breit-Wheeler 对产生过程，在高能极化γ光子与超强非对称激光脉冲的单次相互作用中，对任意自旋极化电子束和正电子束的产生进行了研究。我们开发了一种完全自旋分辨的半经典蒙特卡罗方法来描述对产生和极化。在考虑的一般设置中，产生的对的极化有两个来源：来自极化母γ光子的自旋角动量转移，以及驱动激光场的不对称性和极化。这使得能够开发一种高度灵敏的工具来控制产生的电子和正电子的极化。因此，利用目前可实现的激光设施，通过我们的全光方法可以获得平均极化度高达约 、横向和纵向分量之间可连续调节的致密 GeV 轻子束，这可以作为极化 对撞机的注入器，用于寻找超出标准模型的新物理。
