Vortex $γ$ photon generation via spin-to-orbital angular momentum transfer in nonlinear Compton scattering
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| Main Authors: | , , , , , , , , , |
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| Format: | Preprint |
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2022
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| _version_ | 1866929317781438464 |
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| author | Ababekri, Mamutjan Guo, Ren-Tong Wan, Feng Qiao, B. Li, Zhongpeng Lv, Chong Zhang, Bo Zhou, Weimin Gu, Yuqiu Li, Jian-Xing |
| author_facet | Ababekri, Mamutjan Guo, Ren-Tong Wan, Feng Qiao, B. Li, Zhongpeng Lv, Chong Zhang, Bo Zhou, Weimin Gu, Yuqiu Li, Jian-Xing |
| contents | Vortex $γ$ photons with intrinsic orbital angular momenta (OAM) possess a wealth of applications in various fields, e.g.-strong-laser physics, nuclear physics, particle physics and astrophysics-yet their generation remains unsettled. In this work, we investigate the generation of vortex $γ$ photons via nonlinear Compton scattering of ultrarelativistic electrons in a circularly polarized laser pulse. We develop a quantum electrodynamics scattering theory that explicitly addresses the multiphoton absorption and the angular momentum transfer mechanism. In pulsed laser fields, we unveil the vortex phase structure of the scattering matrix element, discuss how the vortex phase could be transferred to the radiated photon, and derive the radiation rate of the vortex $γ$ photon. We numerically examine the energy spectra and beam characteristics of the radiation, while also investigating the influence of finite laser pulses on the angular momentum and energy distribution of the emitted vortex $γ$ photons. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2211_05467 |
| institution | arXiv |
| publishDate | 2022 |
| record_format | arxiv |
| spellingShingle | Vortex $γ$ photon generation via spin-to-orbital angular momentum transfer in nonlinear Compton scattering Ababekri, Mamutjan Guo, Ren-Tong Wan, Feng Qiao, B. Li, Zhongpeng Lv, Chong Zhang, Bo Zhou, Weimin Gu, Yuqiu Li, Jian-Xing High Energy Physics - Phenomenology Vortex $γ$ photons with intrinsic orbital angular momenta (OAM) possess a wealth of applications in various fields, e.g.-strong-laser physics, nuclear physics, particle physics and astrophysics-yet their generation remains unsettled. In this work, we investigate the generation of vortex $γ$ photons via nonlinear Compton scattering of ultrarelativistic electrons in a circularly polarized laser pulse. We develop a quantum electrodynamics scattering theory that explicitly addresses the multiphoton absorption and the angular momentum transfer mechanism. In pulsed laser fields, we unveil the vortex phase structure of the scattering matrix element, discuss how the vortex phase could be transferred to the radiated photon, and derive the radiation rate of the vortex $γ$ photon. We numerically examine the energy spectra and beam characteristics of the radiation, while also investigating the influence of finite laser pulses on the angular momentum and energy distribution of the emitted vortex $γ$ photons. |
| title | Vortex $γ$ photon generation via spin-to-orbital angular momentum transfer in nonlinear Compton scattering |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2211.05467 |