Nonthermal leptogenesis via direct inflaton decay without SU(2){sub L} triplets
- Physics Division, School of Technology, Aristotle University of Thessaloniki, Thessaloniki 54124 (Greece)
We present a nonthermal 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){sub 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.
- OSTI ID:
- 20711302
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 72, Issue 4; Other Information: DOI: 10.1103/PhysRevD.72.043502; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ASYMMETRY
BARYONS
COSMOLOGY
FEYNMAN DIAGRAM
GAUGE INVARIANCE
INTERFERENCE
NEUTRINO OSCILLATION
NEUTRINOS
PARITY
PARTICLE DECAY
PARTICLE PRODUCTION
POTENTIALS
REST MASS
SPARTICLES
SU-2 GROUPS
SUPERSYMMETRY
SYMMETRY BREAKING
TRIPLETS
U-1 GROUPS
UNITARY SYMMETRY