Flavoured resonant leptogenesis at sub-TeV scales

Granelli, A.; Moffat, K.; Petcov, S.T.

Abstract

We consider sub-TeV scale flavoured resonant leptogenesis within the minimal type-I seesaw scenario with two right-handed singlet neutrinos N1,2forming a pseudo-Dirac pair, concentrating on the case of masses of the pseudo-Dirac pair having values M1,2100 GeV. The case when the CP violating asymme-tries in the individual lepton charges Ll, l=e, μ, τ, and in the total lepton charge Lof the Universe are generated in 1 ↔2 decay processes is investigated. We show that successful leptogenesis is possible for M1,2lying in the interval M1,2=(0.3 −100)GeV. Our results show also, in particular, that for vanishing initial N1,2abundance, flavour effects can play an important role in the generation of the baryon asymme-try, leading to an enhancement of the asymmetry by a factor up to ∼300 with respect to the “unflavoured” leptogenesis scenario.

Citation

Granelli, A., Moffat, K., & Petcov, S. (2021). Flavoured resonant leptogenesis at sub-TeV scales. Nuclear Physics B, 973, https://doi.org/10.1016/j.nuclphysb.2021.115597

• Journal Article Type: Article
• Acceptance Date: Oct 29, 2021
• Online Publication Date: Nov 3, 2021
• Publication Date: 2021
• Deposit Date: Jan 11, 2022
• Publicly Available Date: Jan 11, 2022
• Journal: Nuclear Physics B
• Print ISSN: 0550-3213
• Electronic ISSN: 1873-1562
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 973
• DOI: https://doi.org/10.1016/j.nuclphysb.2021.115597
• Public URL: https://durham-repository.worktribe.com/output/1218260