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GUT Scale Inflation, Non-Thermal Leptogenesis, and Atmospheric Neutrino Oscillations

V. N. Senoguz·Q. Shafi
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Abstract

Leptogenesis scenarios in supersymmetric hybrid inflation models are considered. Sufficient lepton asymmetry leading to successful baryogenesis can be obtained if the reheat temperature T_r>10^6 GeV and the superpotential coupling parameter kappa is in the range 10^-6<kappa<10^-2. For this range of kappa the scalar spectral index n_s=0.99+-0.01. Constraints from neutrino mixing further restrict the range of kappa that is allowed. We analyze in detail the case where the inflaton predominantly decays into the next-to-lightest right handed Majorana neutrino taking into account especially the constraints from atmospheric neutrino oscillations.

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V. N. Senoguz, Q. Shafi. 2003-12-09. GUT Scale Inflation, Non-Thermal Leptogenesis, and Atmospheric Neutrino Oscillations. https://doi.org/10.1016/j.physletb.2003.12.020

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