Neutrino reheating predictions with non-thermal leptogenesis
Abstract Connecting inflation with neutrino physics through non-thermal leptogenesis via direct inflaton-right-handed neutrino (RHN) coupling naturally incorporates neutrino reheating, leaving no ambiguity regarding the early history of the universe. In ref. [1], we demonstrate that non-thermal lept...
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2025-07-01
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| Series: | Journal of High Energy Physics |
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| Online Access: | https://doi.org/10.1007/JHEP07(2025)099 |
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| author | Xinyi Zhang |
| author_facet | Xinyi Zhang |
| author_sort | Xinyi Zhang |
| collection | DOAJ |
| description | Abstract Connecting inflation with neutrino physics through non-thermal leptogenesis via direct inflaton-right-handed neutrino (RHN) coupling naturally incorporates neutrino reheating, leaving no ambiguity regarding the early history of the universe. In ref. [1], we demonstrate that non-thermal leptogenesis from inflaton decay expands the viable parameter space compared to thermal leptogenesis and provides a natural link to inflation. In this work, we refine our previous findings by closely examining the dynamics of neutrino reheating. We first calculate the duration of neutrino reheating on a general basis, then analyze inflationary observables consistent with neutrino reheating across four models, establishing a direct connection between baryon asymmetry and the spectral index. This approach places these two important observables on the same plane and yields specific predictions that help break the degeneracy among inflationary models. The well-motivated and economical framework offers a simple, natural, and testable description of the early universe. |
| format | Article |
| id | doaj-art-2b6d8c031b8c4ecaaf8638c1e43270d5 |
| institution | Kabale University |
| issn | 1029-8479 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj-art-2b6d8c031b8c4ecaaf8638c1e43270d52025-08-20T04:01:42ZengSpringerOpenJournal of High Energy Physics1029-84792025-07-012025712510.1007/JHEP07(2025)099Neutrino reheating predictions with non-thermal leptogenesisXinyi Zhang0Department of Physics, Hebei UniversityAbstract Connecting inflation with neutrino physics through non-thermal leptogenesis via direct inflaton-right-handed neutrino (RHN) coupling naturally incorporates neutrino reheating, leaving no ambiguity regarding the early history of the universe. In ref. [1], we demonstrate that non-thermal leptogenesis from inflaton decay expands the viable parameter space compared to thermal leptogenesis and provides a natural link to inflation. In this work, we refine our previous findings by closely examining the dynamics of neutrino reheating. We first calculate the duration of neutrino reheating on a general basis, then analyze inflationary observables consistent with neutrino reheating across four models, establishing a direct connection between baryon asymmetry and the spectral index. This approach places these two important observables on the same plane and yields specific predictions that help break the degeneracy among inflationary models. The well-motivated and economical framework offers a simple, natural, and testable description of the early universe.https://doi.org/10.1007/JHEP07(2025)099Early Universe Particle PhysicsSterile or Heavy NeutrinosBaryo-and Leptogenesis |
| spellingShingle | Xinyi Zhang Neutrino reheating predictions with non-thermal leptogenesis Journal of High Energy Physics Early Universe Particle Physics Sterile or Heavy Neutrinos Baryo-and Leptogenesis |
| title | Neutrino reheating predictions with non-thermal leptogenesis |
| title_full | Neutrino reheating predictions with non-thermal leptogenesis |
| title_fullStr | Neutrino reheating predictions with non-thermal leptogenesis |
| title_full_unstemmed | Neutrino reheating predictions with non-thermal leptogenesis |
| title_short | Neutrino reheating predictions with non-thermal leptogenesis |
| title_sort | neutrino reheating predictions with non thermal leptogenesis |
| topic | Early Universe Particle Physics Sterile or Heavy Neutrinos Baryo-and Leptogenesis |
| url | https://doi.org/10.1007/JHEP07(2025)099 |
| work_keys_str_mv | AT xinyizhang neutrinoreheatingpredictionswithnonthermalleptogenesis |