Flavoured resonant leptogenesis at sub-TeV scales

We consider sub-TeV scale flavoured resonant leptogenesis within the minimal type-I seesaw scenario with two right-handed singlet neutrinos N1,2 forming a pseudo-Dirac pair, concentrating on the case of masses of the pseudo-Dirac pair having values M1,2≲100 GeV. The case when the CP violating asymme...

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Autores principales:	A. Granelli, K. Moffat, S.T. Petcov
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Nuclear and particle physics. Atomic energy. Radioactivity QC770-798
Acceso en línea:	https://doaj.org/article/abd481f48a984a5bb60d7a45aebaa78a
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spelling	oai:doaj.org-article:abd481f48a984a5bb60d7a45aebaa78a2021-12-04T04:32:55ZFlavoured resonant leptogenesis at sub-TeV scales0550-321310.1016/j.nuclphysb.2021.115597https://doaj.org/article/abd481f48a984a5bb60d7a45aebaa78a2021-12-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S0550321321002947https://doaj.org/toc/0550-3213We consider sub-TeV scale flavoured resonant leptogenesis within the minimal type-I seesaw scenario with two right-handed singlet neutrinos N1,2 forming a pseudo-Dirac pair, concentrating on the case of masses of the pseudo-Dirac pair having values M1,2≲100 GeV. The case when the CP violating asymmetries in the individual lepton charges Ll, l=e,μ,τ, and in the total lepton charge L of the Universe are generated in 1↔2 decay processes is investigated. We show that successful leptogenesis is possible for M1,2 lying in the interval M1,2=(0.3−100) GeV. Our results show also, in particular, that for vanishing initial N1,2 abundance, flavour effects can play an important role in the generation of the baryon asymmetry, leading to an enhancement of the asymmetry by a factor up to ∼300 with respect to the “unflavoured” leptogenesis scenario.A. GranelliK. MoffatS.T. PetcovElsevierarticleNuclear and particle physics. Atomic energy. RadioactivityQC770-798ENNuclear Physics B, Vol 973, Iss , Pp 115597- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Nuclear and particle physics. Atomic energy. Radioactivity QC770-798
spellingShingle	Nuclear and particle physics. Atomic energy. Radioactivity QC770-798 A. Granelli K. Moffat S.T. Petcov Flavoured resonant leptogenesis at sub-TeV scales
description	We consider sub-TeV scale flavoured resonant leptogenesis within the minimal type-I seesaw scenario with two right-handed singlet neutrinos N1,2 forming a pseudo-Dirac pair, concentrating on the case of masses of the pseudo-Dirac pair having values M1,2≲100 GeV. The case when the CP violating asymmetries in the individual lepton charges Ll, l=e,μ,τ, and in the total lepton charge L of the Universe are generated in 1↔2 decay processes is investigated. We show that successful leptogenesis is possible for M1,2 lying in the interval M1,2=(0.3−100) GeV. Our results show also, in particular, that for vanishing initial N1,2 abundance, flavour effects can play an important role in the generation of the baryon asymmetry, leading to an enhancement of the asymmetry by a factor up to ∼300 with respect to the “unflavoured” leptogenesis scenario.
format	article
author	A. Granelli K. Moffat S.T. Petcov
author_facet	A. Granelli K. Moffat S.T. Petcov
author_sort	A. Granelli
title	Flavoured resonant leptogenesis at sub-TeV scales
title_short	Flavoured resonant leptogenesis at sub-TeV scales
title_full	Flavoured resonant leptogenesis at sub-TeV scales
title_fullStr	Flavoured resonant leptogenesis at sub-TeV scales
title_full_unstemmed	Flavoured resonant leptogenesis at sub-TeV scales
title_sort	flavoured resonant leptogenesis at sub-tev scales
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/abd481f48a984a5bb60d7a45aebaa78a
work_keys_str_mv	AT agranelli flavouredresonantleptogenesisatsubtevscales AT kmoffat flavouredresonantleptogenesisatsubtevscales AT stpetcov flavouredresonantleptogenesisatsubtevscales
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Flavoured resonant leptogenesis at sub-TeV scales

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