Neutrino Masses and GUT Baryogenesis

Abstract

We reconsider the GUT-baryogenesis mechanism for generating the baryon asymmetry of the Universe. The baryon asymmetry is produced by the out of equilibrium decay of coloured Higgs bosons at the GUT scale, conserving B-L. If neutrinos are Majorana particles, lepton number violating interactions erase the lepton number excess, but part of the baryon asymmetry may be preserved, provided those interactions are not in thermal equilibrium when the sphaleron processes become effective, at $T\sim 10^{12}GeV$. We analyse whether this mechanism for baryogenesis is feasible in a variety of GUT models of fermion masses proposed in the literature, based on horizontal symmetries.

Talk presented at AHEP2003, Valencia, Spain, October 2003

References in corpus (9)

• Large Mixing Angle MSW and Atmospheric Neutrinos from Single Right-Handed Neutrino Dominance and U(1) Family Symmetry
• b-tau unification and large atmospheric mixing: a case for non-canonical see-saw
• Leptogenesis, CP violation and neutrino data: What can we learn?
• Neutrino masses and the baryon asymmetry
• Large Lepton Mixing in Seesaw Models - Coset-space Family Unification -
• Neutrino Masses and Mixing Angles in a Realistic String-Inspired Model
• Resurrection of Grand Unified Theory Baryogenesis
• Global Analysis of a Supersymmetric Pati-Salam Model
• SO(10) GUT Models and Their Present Success in Explaining Mass and Mixing Data