Leptogenesis in Higgs triplet model

Journal Article · Tue Nov 28 04:00:00 EST 2006 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2409107· OSTI ID:20900784

Scopel, Stefano ^[1]

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1. Korea Institute of Advanced Study, 207-43 Cheongnyangni 2-dong, Dongdaemun-gu, Seoul 130-722 (Korea, Republic of)

We analyze leptogenesis in a supersymmetric triplet seesaw scenario that explains at the same time the baryon asymmetry in the Universe and the observed neutrino masses. First, we adopt a phenomenolog approach where, in order to single out the main features of the model, the decay branching ratios of the triplets and the amount of CP-violation in their different decay channels are assumed as free parameters. We then consider the particular example of soft leptogenesis, which employs a non-vanishing phase and a resonant behavior in the supersymmetry breaking sector to generate CP violation. In both scenarios we solve the relevant Boltzman equations and show that gauge annihilation processes may strongly suppress the resulting lepton asymmetry. In particular we find that soft leptogenesis is successful only for a triplet mass at the TeV scale, opening up an interesting opportunity for testing the model in future colliders.

• OSTI ID: 20900784
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 878; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANNIHILATION
ASYMMETRY
BARYONS
BRANCHING RATIO
CP INVARIANCE
EQUATIONS
HIGGS MODEL
MASS
NEUTRINOS
PARTICLE DECAY
QUANTUM FIELD THEORY
SUPERSYMMETRY
SYMMETRY BREAKING
TEV RANGE 01-10
TRIPLETS
UNIVERSE