Constraints on leptogenesis from a symmetry viewpoint

2009/08/31 by R. González Felipe, R. Gonzalez Felipe, Hugo Serôdio +1 · 1 citation
Biochemistry, Genetics and Molecular Biology · Physics and Astronomy · #Fractal and DNA sequence analysis #Neutrino Physics Research #Particle physics theoretical and experimental studies #hep-ph #hep-th

paper · pdf · doi:10.1103/physrevd.81.053008

published as Phys.Rev.D81:053008,2010 · 5 pages; a few comments added; final version to appear in Phys. Rev. D

arxiv created 2010/03/17 · openalex publication_date 2010/03/19 · arxiv updated 2010/04/29 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

It is shown that type I seesaw models based on the standard model Lagrangian extended with three heavy Majorana right-handed fields do not have leptogenesis in leading order, if the symmetries of mass matrices are also the residual symmetry of the Lagrangian. In particular, flavor models that lead to a mass-independent leptonic mixing have a vanishing leptogenesis CP asymmetry. Based on symmetry arguments, we prove that in these models the Dirac-neutrino Yukawa coupling combinations relevant for leptogenesis are diagonal in the physical basis where the charged leptons and heavy Majorana neutrinos are diagonal.

Citations

• IsS4the horizontal symmetry of tri-bimaximal lepton mixing?
• μτ symmetry, tribimaximal mixing and four zero neutrino Yukawa textures

Cited by

• SUSY adjoint SU(5) grand unified model with S4 flavor symmetry

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