Leptogenesis through direct inflaton decay to light particles

Details Leptogenesis through direct inflaton decay to light particles Leptogenesis through direct inflaton decay to light particles

2003-12-02

arxiv.org/abs/hep-ph/0312033v2

Phys.Rev. D69 (2004) 075012

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages including 3 figures, uses Revtex, minor corrections, references added

Scientific paper

10.1103/PhysRevD.69.075012

We present a scenario of nonthermal leptogenesis following supersymmetric hybrid inflation, in the case where inflaton decay to both heavy right handed neutrino and SU(2)_L triplet superfields is kinematically disallowed. Lepton asymmetry is generated through the decay of the inflaton into light particles by the interference of one-loop diagrams with right handed neutrino and SU(2)_L triplet exchange respectively. We require superpotential couplings explicitly violating a U(1) R-symmetry and R-parity. However, the broken R-parity need not have currently observable low-energy signatures. Also, the lightest sparticle can be stable. Some R-parity violating slepton decays may, though, be detectable in the future colliders. We take into account the constraints from neutrino masses and mixing and the preservation of the primordial lepton asymmetry.

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