GUT scale inflation, nonthermal leptogenesis, and atmospheric neutrino oscillations - INSPIRE

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GUT scale inflation, nonthermal leptogenesis, and atmospheric neutrino oscillations

Sep, 2003

19 pages

Published in:

Phys.Lett.B 582 (2004) 6-14

e-Print:

hep-ph/0309134 [hep-ph]

DOI:

10.1016/j.physletb.2003.12.020

Report number:

BA-03-12

View in:

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Abstract: (Elsevier)

Leptogenesis scenarios in supersymmetric hybrid inflation models are considered. Sufficient lepton asymmetry leading to successfull baryogenesis can be obtained if the reheat temperature T r ≳10 6 GeV and the superpotential coupling parameter κ is in the range 10 −6 ≲ κ ≲10 −2 . For this range of κ the scalar spectral index n s ≃0.99±0.01. Constraints from neutrino mixing further restrict the range of κ 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.

inflation: hybrid
grand unified theory
lepton: production
neutrino: oscillation
neutrino: atmosphere
supersymmetry
inflaton: decay
neutrino: Majorana
neutrino: right-handed
numerical calculations

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