Baryogenesis via leptogenesis in adjoint SU(5)

The possibility of explaining the baryon asymmetry in the Universe through the leptogenesis mechanism in the context of adjoint SU(5) is investigated. In this model neutrino masses are generated through the type I and type III seesaw mechanisms, and the field responsible for the type III seesaw, cal...

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Bibliographic Details
Published in:Journal of cosmology and astroparticle physics 2008-08, Vol.2008 (8), p.037
Main Authors: Blanchet, Steve, Fileviez Pérez, Pavel
Format: Article
Language:English
Subjects:
ASTROPHYSICS, COSMOLOGY AND ASTRONOMY
ASYMMETRY
BARYONS
GAUGE INVARIANCE
GEV RANGE
LEPTONS
LIMITING VALUES
MASS
MATHEMATICAL SPACE
NEUTRINOS
PARTICLE DECAY
PARTICLE PRODUCTION
PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
PROTONS
SELF-ENERGY
SU-5 GROUPS
UNIVERSE
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Summary:The possibility of explaining the baryon asymmetry in the Universe through the leptogenesis mechanism in the context of adjoint SU(5) is investigated. In this model neutrino masses are generated through the type I and type III seesaw mechanisms, and the field responsible for the type III seesaw, called {rho}{sub 3}, generates the B-L asymmetry needed to satisfy the observed value of the baryon asymmetry in the Universe. We find that the CP asymmetry originates only from the vertex correction, since the self-energy contribution is not present. When neutrino masses have a normal hierarchy, successful leptogenesis is possible for 10{sup 11} GeV{approx}
ISSN:1475-7516
1475-7516
DOI:10.1088/1475-7516/2008/08/037