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

Journal Article · Sun Feb 01 00:00:00 EST 2009 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.79.033010· OSTI ID:21259882

Peihong, Gu ^[1]; Hirsch, M; Valle, J W. F. ^[2]; Sarkar, Utpal ^[3]

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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)

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.

• OSTI ID: 21259882
• Journal Information: Physical Review. D, Particles Fields, Vol. 79, Issue 3; Other Information: DOI: 10.1103/PhysRevD.79.033010; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

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