Non-thermal leptogenesis via direct inflaton decay without SU(2)(L) triplets

Abstract

We present a non-thermal leptogenesis scenario following standard supersymmetric hybrid inflation, in the case where light neutrinos acquire mass via the usual seesaw mechanism and inflaton decay to heavy right-handed neutrino superfields is kinematically disallowed, or the right-handed neutrinos which can be decay products of the inflaton are unable to generate sufficient baryon asymmetry via their subsequent decay. The primordial lepton asymmetry is generated through the decay of the inflaton into light particles by the interference of one-loop diagrams with exchange of different right-handed neutrinos. The mechanism requires superpotential couplings explicitly violating a U(1) R-symmetry and R-parity. We take into account the constraints from neutrino masses and mixing and the preservation of the primordial asymmetry. We consider two models, one without and one with SU(2)(R) gauge symmetry. We show that the former is viable, whereas the latter is ruled out. Although the broken R-parity need not have currently observable low-energy signatures, some R-parity-violating slepton decays may be detectable in the future colliders.

arXiv comment22 pages including 9 figures, uses Revtex, version to appear in PRD

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Cited by in corpus (10)

• Electroweak-Scale Resonant Leptogenesis
• Neutrino masses, mixing and leptogenesis in TeV scale B-L extension of the standard model
• Reheating in supersymmetric high scale inflation
• R-parity violation assisted thermal leptogenesis in the seesaw mechanism
• TeV Scale Leptogenesis in B-L Model with Alternative Cosmologies
• Eliminating the eta-problem in SUGRA Hybrid Inflation with Vector Backreaction
• Inflation, Leptogenesis, and Yukawa Quasi-Unification within a Supersymmetric Left-Right Model
• Supermassive gravitinos, dark matter, leptogenesis and flat direction baryogenesis
• Low-Energy Thermal Leptogenesis in an Extended NMSSM Model
• Non-thermal leptogenesis with distinct CP violation and minimal dark matter