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arXiv · 0811.0953

Neutrino masses, leptogenesis and dark matter in hybrid seesaw

Pei-Hong Gu·M. Hirsch·Utpal Sarkar·J. W. F. Valle
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Abstract

We suggest a hybrid seesaw model where relatively ``light''right-handed neutrinos give no contribution to the neutrino mass matrix due to a special symmetry. This allows their Yukawa couplings to the standard model particles to be relatively strong, so that the standard model Higgs boson can decay dominantly to a left and a right-handed neutrino, leaving another stable right-handed neutrino as cold dark matter. In our model neutrino masses arise via the type-II seesaw mechanism, the Higgs triplet scalars being also responsible for the generation of the matter-antimatter asymmetry via the leptogenesis mechanism.

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Pei-Hong Gu, M. Hirsch, Utpal Sarkar, J. W. F. Valle. 2008-11-06. Neutrino masses, leptogenesis and dark matter in hybrid seesaw. https://doi.org/10.1103/physrevd.79.033010

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