Constraints on leptogenesis from a symmetry viewpoint

Journal Article · Mon Mar 01 04:00:00 EST 2010 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.81.053008· OSTI ID:21409832

Gonzalez Felipe, R ^[1]; Serodio, H ^[2]

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1. Area Cientifica de Fisica, Instituto Superior de Engenharia de Lisboa, Rua Conselheiro Emidio Navarro 1, 1959-007 Lisboa (Portugal)
2. Departamento de Fisica and Centro de Fisica Teorica de Particulas (CFTP), Instituto Superior Tecnico, Av. Rovisco Pais, 1049-001 Lisboa (Portugal)

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.

• OSTI ID: 21409832
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 5 Vol. 81; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ASYMMETRY
COMPOSITE MODELS
ELEMENTARY PARTICLES
FERMIONS
FIELD THEORIES
FLAVOR MODEL
FUNCTIONS
GRAND UNIFIED THEORY
LAGRANGIAN FUNCTION
LEPTONS
MAJORANA THEORY
MASS
MASSLESS PARTICLES
MATHEMATICAL MODELS
MIXING
NEUTRINOS
NUCLEAR POTENTIAL
PARTICLE MODELS
PARTICLE PRODUCTION
POTENTIALS
QUANTUM FIELD THEORY
QUARK MODEL
STANDARD MODEL
SYMMETRY
UNIFIED GAUGE MODELS
YUKAWA POTENTIAL