Di-lepton production from a single photon in strong magnetic fields: vacuum dichroism
Abstract We study di-lepton production from a single photon in the presence of a strong constant magnetic field. By the use of the Ritus-basis formalism, we analytically evaluate the photon-to-di-lepton conversion vertex with fully taking into account the non-perturbative interactions between the pr...
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Format: | Article |
Language: | English |
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SpringerOpen
2021-01-01
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Series: | Journal of High Energy Physics |
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Online Access: | https://doi.org/10.1007/JHEP01(2021)093 |
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author | Koichi Hattori Hidetoshi Taya Shinsuke Yoshida |
author_facet | Koichi Hattori Hidetoshi Taya Shinsuke Yoshida |
author_sort | Koichi Hattori |
collection | DOAJ |
description | Abstract We study di-lepton production from a single photon in the presence of a strong constant magnetic field. By the use of the Ritus-basis formalism, we analytically evaluate the photon-to-di-lepton conversion vertex with fully taking into account the non-perturbative interactions between the produced fermions and the strong magnetic field. We show that the di-lepton spectrum becomes anisotropic with respect to the magnetic-field direction and depends on the photon polarization as a manifestation of the vacuum dichroism in a strong magnetic field. According to the energy conservation in the presence of the Landau quantization, not only the transverse momentum of the produced fermions but also the longitudinal momentum is discretized, and the di-lepton spectrum exhibits spike structures as functions of the incident photon energy and the magnetic field strength. We also show that the di-lepton production is strictly prohibited for massless fermions in the lowest Landau levels as an analogue of the so-called helicity suppression. |
first_indexed | 2024-12-17T05:43:00Z |
format | Article |
id | doaj.art-98b50eee76d444bea0b958bb28ce1b60 |
institution | Directory Open Access Journal |
issn | 1029-8479 |
language | English |
last_indexed | 2024-12-17T05:43:00Z |
publishDate | 2021-01-01 |
publisher | SpringerOpen |
record_format | Article |
series | Journal of High Energy Physics |
spelling | doaj.art-98b50eee76d444bea0b958bb28ce1b602022-12-21T22:01:24ZengSpringerOpenJournal of High Energy Physics1029-84792021-01-012021114110.1007/JHEP01(2021)093Di-lepton production from a single photon in strong magnetic fields: vacuum dichroismKoichi Hattori0Hidetoshi Taya1Shinsuke Yoshida2Yukawa Institute for Theoretical Physics, Kyoto UniversityResearch and Education Center for Natural Sciences, Keio UniversityGuangdong Provincial Key Laboratory of Nuclear Science, Institute of Quantum Matter, South China Normal UniversityAbstract We study di-lepton production from a single photon in the presence of a strong constant magnetic field. By the use of the Ritus-basis formalism, we analytically evaluate the photon-to-di-lepton conversion vertex with fully taking into account the non-perturbative interactions between the produced fermions and the strong magnetic field. We show that the di-lepton spectrum becomes anisotropic with respect to the magnetic-field direction and depends on the photon polarization as a manifestation of the vacuum dichroism in a strong magnetic field. According to the energy conservation in the presence of the Landau quantization, not only the transverse momentum of the produced fermions but also the longitudinal momentum is discretized, and the di-lepton spectrum exhibits spike structures as functions of the incident photon energy and the magnetic field strength. We also show that the di-lepton production is strictly prohibited for massless fermions in the lowest Landau levels as an analogue of the so-called helicity suppression.https://doi.org/10.1007/JHEP01(2021)093Heavy Ion Phenomenology |
spellingShingle | Koichi Hattori Hidetoshi Taya Shinsuke Yoshida Di-lepton production from a single photon in strong magnetic fields: vacuum dichroism Journal of High Energy Physics Heavy Ion Phenomenology |
title | Di-lepton production from a single photon in strong magnetic fields: vacuum dichroism |
title_full | Di-lepton production from a single photon in strong magnetic fields: vacuum dichroism |
title_fullStr | Di-lepton production from a single photon in strong magnetic fields: vacuum dichroism |
title_full_unstemmed | Di-lepton production from a single photon in strong magnetic fields: vacuum dichroism |
title_short | Di-lepton production from a single photon in strong magnetic fields: vacuum dichroism |
title_sort | di lepton production from a single photon in strong magnetic fields vacuum dichroism |
topic | Heavy Ion Phenomenology |
url | https://doi.org/10.1007/JHEP01(2021)093 |
work_keys_str_mv | AT koichihattori dileptonproductionfromasinglephotoninstrongmagneticfieldsvacuumdichroism AT hidetoshitaya dileptonproductionfromasinglephotoninstrongmagneticfieldsvacuumdichroism AT shinsukeyoshida dileptonproductionfromasinglephotoninstrongmagneticfieldsvacuumdichroism |