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Towards a complete theory of thermal leptogenesis in the SM and MSSM
We perform a thorough study of thermal leptogenesis adding finite temperature effects, RGE corrections, scatterings involving gauge bosons and by properly avoiding overcounting on-shell processes. Assuming hierarchical right-handed neutrinos with arbitrary abundancy, successful leptogenesis can be a...
Autores principales: | , , , , |
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Lenguaje: | eng |
Publicado: |
2003
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Materias: | |
Acceso en línea: | https://dx.doi.org/10.1016/j.nuclphysb.2004.02.01 http://cds.cern.ch/record/676636 |
_version_ | 1780900963918282752 |
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author | Giudice, Gian Francesco Notari, A Raidal, Martti Riotto, Antonio Strumia, A |
author_facet | Giudice, Gian Francesco Notari, A Raidal, Martti Riotto, Antonio Strumia, A |
author_sort | Giudice, Gian Francesco |
collection | CERN |
description | We perform a thorough study of thermal leptogenesis adding finite temperature effects, RGE corrections, scatterings involving gauge bosons and by properly avoiding overcounting on-shell processes. Assuming hierarchical right-handed neutrinos with arbitrary abundancy, successful leptogenesis can be achieved if left-handed neutrinos are lighter than 0.13 eV and right-handed neutrinos heavier than 0.2 10^8 GeV (SM case, 3sigma C.L.). MSSM results are similar. Furthermore, we study how reheating after inflation affects thermal leptogenesis. Assuming that the inflaton reheats SM particles but not directly right-handed neutrinos, we derive the lower bound on the reheating temperature to be T_RH > 2 10^9 GeV. This bound conflicts with the cosmological gravitino bound present in supersymmetric theories. We study some scenarios that avoid this conflict: `soft leptogenesis', leptogenesis in presence of a large right-handed (s)neutrino abundancy or of a sneutrino condensate. |
id | cern-676636 |
institution | Organización Europea para la Investigación Nuclear |
language | eng |
publishDate | 2003 |
record_format | invenio |
spelling | cern-6766362019-09-30T06:29:59Zdoi:10.1016/j.nuclphysb.2004.02.01http://cds.cern.ch/record/676636engGiudice, Gian FrancescoNotari, ARaidal, MarttiRiotto, AntonioStrumia, ATowards a complete theory of thermal leptogenesis in the SM and MSSMParticle Physics - PhenomenologyWe perform a thorough study of thermal leptogenesis adding finite temperature effects, RGE corrections, scatterings involving gauge bosons and by properly avoiding overcounting on-shell processes. Assuming hierarchical right-handed neutrinos with arbitrary abundancy, successful leptogenesis can be achieved if left-handed neutrinos are lighter than 0.13 eV and right-handed neutrinos heavier than 0.2 10^8 GeV (SM case, 3sigma C.L.). MSSM results are similar. Furthermore, we study how reheating after inflation affects thermal leptogenesis. Assuming that the inflaton reheats SM particles but not directly right-handed neutrinos, we derive the lower bound on the reheating temperature to be T_RH > 2 10^9 GeV. This bound conflicts with the cosmological gravitino bound present in supersymmetric theories. We study some scenarios that avoid this conflict: `soft leptogenesis', leptogenesis in presence of a large right-handed (s)neutrino abundancy or of a sneutrino condensate.hep-ph/0310123CERN-TH-2003-240IFUP-TH-2003-37oai:cds.cern.ch:6766362003-10-10 |
spellingShingle | Particle Physics - Phenomenology Giudice, Gian Francesco Notari, A Raidal, Martti Riotto, Antonio Strumia, A Towards a complete theory of thermal leptogenesis in the SM and MSSM |
title | Towards a complete theory of thermal leptogenesis in the SM and MSSM |
title_full | Towards a complete theory of thermal leptogenesis in the SM and MSSM |
title_fullStr | Towards a complete theory of thermal leptogenesis in the SM and MSSM |
title_full_unstemmed | Towards a complete theory of thermal leptogenesis in the SM and MSSM |
title_short | Towards a complete theory of thermal leptogenesis in the SM and MSSM |
title_sort | towards a complete theory of thermal leptogenesis in the sm and mssm |
topic | Particle Physics - Phenomenology |
url | https://dx.doi.org/10.1016/j.nuclphysb.2004.02.01 http://cds.cern.ch/record/676636 |
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