Neutrino oscillations v.s. leptogenesis in SO(10) models

2000/04/30 by Emmanuel Nezri, Jean Orloff
Physics and Astronomy · #Asymmetry #Dark Matter and Cosmic Phenomena #Leptogenesis #Lepton #Mixing (physics) #Neutrino #Neutrino Physics Research #Neutrino oscillation #Particle physics theoretical and experimental studies #Solar neutrino #hep-ph

paper · pdf · doi:10.1088/1126-6708/2003/04/020

published as JHEP 0304 (2003) 020 · 23 pages, 8 eps figures, JHEP3 format; more accurate effect of dilution reduces previous results, inclusion of all phases, added references

arxiv created 2003/04/04 · openalex publication_date 2003/04/11 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

We study the link between neutrino oscillations and leptogenesis in the minimal framework assuming an SO(10) see-saw mechanism with 3 families. Dirac neutrino masses being fixed, the solar and atmospheric data then generically induce a large mass-hierarchy and a small mixing between the lightest right-handed neutrinos, which fails to produce sufficient lepton asymmetry by 5 orders of magnitudes at least. This failure can be attenuated for a very specific value of the mixing sin²(2θ_e3)=0.1, which interestingly lies at the boundary of the CHOOZ exclusion region, but will be accessible to future long baseline experiments.

Citations

• CPviolation in the seesaw model
• Baryogenesis through leptogenesis
• CP asymmetry in Majorana neutrino decays
• Horizontal Symmetry and Masses of Neutrinos
• Measurement of Day and Night Neutrino Energy Spectra at SNO and Constraints on Neutrino Mixing Parameters
• Cosmic microwave background, matter–antimatter asymmetry and neutrino masses
• Standard Model CP-violation and Baryon asymmetry
• On anomalous electroweak baryon-number non-conservation in the early universe