Neutrino masses, leptogenesis, and dark matter in a hybrid seesaw model

2008/11/06 by Pei-Hong Gu, M. Hirsch, Utpal Sarkar +1 · 2 citations
Physics and Astronomy · #Dark Matter and Cosmic Phenomena #Neutrino Physics Research #Particle physics theoretical and experimental studies #hep-ph

paper · pdf · doi:10.1103/physrevd.79.033010

published as Phys.Rev.D79:033010,2009 · 4 pages

arxiv created 2008/11/06 · openalex publication_date 2009/02/18 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

We suggest a hybrid seesaw model where relatively light right-handed neutrinos give no contribution to 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.

Citations

• On anomalous electroweak baryon-number non-conservation in the early universe

Cited by

• Leptogenesis in the Universe
• Dark matter in the type Ib seesaw model

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