Forbidden neutrinogenesis
Abstract The origin of neutrino masses can be simply attributed to a new scalar beyond the Standard Model. We demonstrate that leptogenesis can explain the baryon asymmetry of the universe already in such a minimal framework. Different from traditional leptogenesis, the realization here exploits the...
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| Format: | Article |
| Language: | English |
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SpringerOpen
2025-08-01
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| Series: | Journal of High Energy Physics |
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| Online Access: | https://doi.org/10.1007/JHEP08(2025)001 |
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| _version_ | 1849334031599009792 |
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| author | Shinya Kanemura Shao-Ping Li |
| author_facet | Shinya Kanemura Shao-Ping Li |
| author_sort | Shinya Kanemura |
| collection | DOAJ |
| description | Abstract The origin of neutrino masses can be simply attributed to a new scalar beyond the Standard Model. We demonstrate that leptogenesis can explain the baryon asymmetry of the universe already in such a minimal framework. Different from traditional leptogenesis, the realization here exploits the thermal behavior of leptons at finite temperatures, which is otherwise kinematically forbidden in vacuum. We present detailed calculations of the CP asymmetry in the Schwinger-Keldysh Closed-Time-Path formalism, and compute the asymmetry evolution via the Kadanoff-Baym equation. Such minimal forbidden neutrinogenesis establishes a direct link between the baryon asymmetry and the CP-violating phase from neutrino mixing, making the scenario a compelling target in neutrino oscillation experiments. Complementary probes from cosmology, flavor physics and colliders are also briefly discussed. |
| format | Article |
| id | doaj-art-bcff4759f3ed451d92a66310513f108d |
| institution | Kabale University |
| issn | 1029-8479 |
| language | English |
| publishDate | 2025-08-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj-art-bcff4759f3ed451d92a66310513f108d2025-08-20T03:45:40ZengSpringerOpenJournal of High Energy Physics1029-84792025-08-012025814110.1007/JHEP08(2025)001Forbidden neutrinogenesisShinya Kanemura0Shao-Ping Li1Department of Physics, The University of OsakaDepartment of Physics, The University of OsakaAbstract The origin of neutrino masses can be simply attributed to a new scalar beyond the Standard Model. We demonstrate that leptogenesis can explain the baryon asymmetry of the universe already in such a minimal framework. Different from traditional leptogenesis, the realization here exploits the thermal behavior of leptons at finite temperatures, which is otherwise kinematically forbidden in vacuum. We present detailed calculations of the CP asymmetry in the Schwinger-Keldysh Closed-Time-Path formalism, and compute the asymmetry evolution via the Kadanoff-Baym equation. Such minimal forbidden neutrinogenesis establishes a direct link between the baryon asymmetry and the CP-violating phase from neutrino mixing, making the scenario a compelling target in neutrino oscillation experiments. Complementary probes from cosmology, flavor physics and colliders are also briefly discussed.https://doi.org/10.1007/JHEP08(2025)001Baryo-and LeptogenesisEarly Universe Particle Physics |
| spellingShingle | Shinya Kanemura Shao-Ping Li Forbidden neutrinogenesis Journal of High Energy Physics Baryo-and Leptogenesis Early Universe Particle Physics |
| title | Forbidden neutrinogenesis |
| title_full | Forbidden neutrinogenesis |
| title_fullStr | Forbidden neutrinogenesis |
| title_full_unstemmed | Forbidden neutrinogenesis |
| title_short | Forbidden neutrinogenesis |
| title_sort | forbidden neutrinogenesis |
| topic | Baryo-and Leptogenesis Early Universe Particle Physics |
| url | https://doi.org/10.1007/JHEP08(2025)001 |
| work_keys_str_mv | AT shinyakanemura forbiddenneutrinogenesis AT shaopingli forbiddenneutrinogenesis |