Thermal leptogenesis with triplet Higgs boson and mass varying neutrinos

Journal Article · Wed Sep 15 04:00:00 EDT 2004 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PhysRevD.70.063511· OSTI ID:20705203

Peihong, Gu; Xiaojun, Bi ^[1]

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1. Institute of High Energy Physics, Chinese Academy of Sciences, P.O. Box 918-4, Beijing 100039 (China)

We study the thermal leptogenesis in the scenario where the standard model is extended to include one SU(2){sub L} triplet Higgs boson, in addition to three generations of the right-handed neutrinos. In the model, we introduce the coupling between the quintessence and the right-handed neutrinos, the triplet Higgs boson, so that the light neutrino masses vary during the evolution of the Universe. Assuming that the lepton number asymmetry is generated by the decays of the lightest right-handed neutrino N{sub 1}, we find the thermal leptogenesis can be characterized by four model independent parameters. In the case where the contribution of the triplet Higgs to the lepton asymmetry is dominant, we give the relation between the minimal M{sub 1} and the absolute mass scale m of the light neutrinos, by solving the Boltzmann equations numerically. We will also show that, with the varying neutrino masses, the reheating temperature can be lowered in comparison to the traditional thermal leptogenesis.

• OSTI ID: 20705203
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 6 Vol. 70; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ASYMMETRY
BOLTZMANN EQUATION
COMPARATIVE EVALUATIONS
COSMOLOGY
COUPLING
EVOLUTION
HIGGS BOSONS
HIGGS MODEL
LEPTON NUMBER
NEUTRINOS
NONLUMINOUS MATTER
REST MASS
STANDARD MODEL
SU-2 GROUPS
TRIPLETS
UNIVERSE