1201.6189 (Anupam Mazumdar et al.)

Split neutrinos - leptogenesis, dark matter and inflation    [PDF]

Anupam Mazumdar, Stefano Morisi

We propose a simple framework to split neutrinos with a slight departure from
tribimaximal mixing - where two of the neutrinos are Majorana type which
provide thermal leptogenesis. The Dirac neutrino with a tiny Yukawa coupling
explains primordial inflation and the cosmic microwave background radiation,
where the inflaton is the gauge invariant flat direction. The observed baryon
asymmetry, and the scale of inflation are intimately tied to the observed
reactor angle, which can be further constrained by the LHC and the neutrinoless
double beta decay experiments. The model also provides the lightest right
handed sneutrino as a part of the inflaton to be the dark matter candidate.

View original: http://arxiv.org/abs/1201.6189