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

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.

Authors:
 [1]; ;  [2];  [3]
  1. Abdus Salam International Centre for Theoretical Physics, Strada Costiera 11, 34014 Trieste (Italy)
  2. AHEP Group, Institut de Fisica Corpuscular-C.S.I.C./Universitat de Valencia, Edificio Institutos de Paterna, Apt 22085, E-46071 Valencia (Spain)
  3. Physical Research Laboratory, Ahmedabad 380009 (India)
Publication Date:
OSTI Identifier:
21259882
Resource Type:
Journal Article
Journal Name:
Physical Review. D, Particles Fields
Additional Journal Information:
Journal Volume: 79; Journal Issue: 3; Other Information: DOI: 10.1103/PhysRevD.79.033010; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0556-2821
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ANTIMATTER; ASYMMETRY; COUPLING; HIGGS BOSONS; HIGGS MODEL; HYBRIDIZATION; MASS; NEUTRINOS; NONLUMINOUS MATTER; PARTICLE DECAY; SIMULATION; STANDARD MODEL; SYMMETRY; TRIPLETS; YUKAWA POTENTIAL

Citation Formats

Gu Peihong, Hirsch, M., Valle, J. W. F., and Sarkar, Utpal. Neutrino masses, leptogenesis, and dark matter in a hybrid seesaw model. United States: N. p., 2009. Web. doi:10.1103/PHYSREVD.79.033010.
Gu Peihong, Hirsch, M., Valle, J. W. F., & Sarkar, Utpal. Neutrino masses, leptogenesis, and dark matter in a hybrid seesaw model. United States. doi:10.1103/PHYSREVD.79.033010.
Gu Peihong, Hirsch, M., Valle, J. W. F., and Sarkar, Utpal. Sun . "Neutrino masses, leptogenesis, and dark matter in a hybrid seesaw model". United States. doi:10.1103/PHYSREVD.79.033010.
@article{osti_21259882,
title = {Neutrino masses, leptogenesis, and dark matter in a hybrid seesaw model},
author = {Gu Peihong and Hirsch, M. and Valle, J. W. F. and Sarkar, Utpal},
abstractNote = {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.},
doi = {10.1103/PHYSREVD.79.033010},
journal = {Physical Review. D, Particles Fields},
issn = {0556-2821},
number = 3,
volume = 79,
place = {United States},
year = {2009},
month = {2}
}