Get started
Work

Low scale leptogenesis under neutrino μ − τ reflection symmetry

Year: 2025
Type: article
Abstract: In the literature, the neutrino μ − τ reflection symmetry (which has the interesting predictions θ 23 = π / 4 and δ = ± π / 2 for the atmospherical neutrino mixing angle and Dirac C P phase) is an attractive and widely studied candidate for the flavor symmetries in the neutrino sector. However, it is known that, when the seesaw model is furnished with this symmetry, the leptogenesis mechanism (which provides an elegant explanation for the baryon-antibaryon asymmetry of the Universe) can only work in the two-flavor regime (which only holds for the right-handed neutrino masses in the range 10 9 – 10 12 GeV ). This prohibits us to have a low scale seesaw model (which has the potential to be directly accessed by running or upcoming collider experiments) that can have the μ − τ reflection symmetry and successful leptogenesis simultaneously. In this paper, for the first time, we demonstrate that the successful leptogenesis may also be achieved in low scale seesaw models furnished with the μ − τ reflection symmetry, by means of the flavor nonuniversality of the conversion efficiencies from the flavored lepton asymmetries to the baryon asymmetry via the sphaleron process. We perform the study in both the resonant leptogenesis regime and the leptogenesis via oscillations (Akhmedov-Rubakov-Smirnov leptogenesis) regime.
DOI: 10.1103/physrevd.111.035011
Language: English
Open Access status: hybrid
OpenAlex ID: W4407407004
FWCI: 1.89
Cites: 57
Cited by: 4
Related to: 10