Affordable Access

Publisher Website

Sneutrino inflation in the light of WMAP: reheating, leptogenesis and flavour-violating lepton decays

Authors
Journal
Physics Letters B
0370-2693
Publisher
Elsevier
Publication Date
Volume
581
Identifiers
DOI: 10.1016/j.physletb.2003.11.029
Keywords
  • Astrophysics And Cosmology
Disciplines
  • Astronomy
  • Physics

Abstract

Abstract We reconsider the possibility that inflation was driven by a sneutrino—the scalar supersymmetric partner of a heavy singlet neutrino—in the minimal seesaw model of neutrino masses. We show that this model is consistent with data on the cosmic microwave background (CMB), including those from the WMAP satellite. We derive and implement the CMB constraints on sneutrino properties, calculate reheating and the cosmological baryon asymmetry arising via direct leptogenesis from sneutrino decays following sneutrino inflation, and relate them to light neutrino masses. We show that this scenario is compatible with a low reheating temperature that avoids the gravitino problem, and calculate its predictions for flavour-violating decays of charged leptons. We find that μ→ eγ should occur close to the present experimental upper limits, as might also τ→ μγ.

There are no comments yet on this publication. Be the first to share your thoughts.