Neutrino mixing and leptogenesis inμ−τsymmetry

2014/08/31 by E. I. Lashin, N. Chamoun, C. Hamzaoui +2
Physics and Astronomy · #Astrophysics and Cosmic Phenomena #Asymmetry #Leptogenesis #Lepton #Neutrino #Neutrino Physics Research #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Seesaw molecular geometry #hep-ph

paper · pdf · doi:10.1103/physrevd.91.113014

published as Phys. Rev. D 91, 113014 (2015) · 29 pages, 1 figure, 3 tables. Complete re-analysis. Version to appear in PRD

arxiv created 2015/05/21 · openalex publication_date 2015/06/25 · arxiv updated 2015/07/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

We study the consequences of the Z₂ symmetry behind the \ensuremathμ-\ensuremathτ universality in the neutrino mass matrix. We then implement this symmetry in the type-I seesaw mechanism and show how it can accommodate all sorts of lepton mass hierarchies and generate enough lepton asymmetry to interpret the observed baryon asymmetry in the universe. We also show how a specific form of a high-scale perturbation is kept when translated via the seesaw into the low scale domain, where it can accommodate the neutrino mixing data. We finally present a realization of the high scale perturbed texture through the addition of matter and extra exact symmetries.

Citations

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