Journal
PHYSICS LETTERS B
Volume 762, Issue -, Pages 214-218Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.physletb.2016.09.027
Keywords
Neutrino masses and mixing; Dark matter stability
Funding
- Spanish grants [FPA2011-2297, FPA2014-58183-P, CSD2009-00064, SEV-2014-0398, PROMETEOII/2014/084]
- PAPIIT [IA101516, IN111115]
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We propose a scotogenic mechanism relating small neutrino mass and cosmological dark matter. Neutrinos are Dirac fermions with masses arising only in two-loop order through the sector responsible for dark matter. Two triality symmetries ensure both dark matter stability and strict lepton number conservation at higher orders. A global spontaneously broken U(1) symmetry leads to a physical Diraconthat induces invisible Higgs decays which add up to the Higgs to dark matter mode. This enhances sensitivities to spin-independent WIMP dark matter search below m(h)/2. (C) 2016 The Authors. Published by Elsevier B.V.
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