The Higgs seesaw induced neutrino masses and dark matter
Abstract
In this paper we propose a possible explanation of the active neutrino Majorana masses with the TeV scale new physics which also provide a dark matter candidate. We extend the Standard Model (SM) with a local U(1) ‧ symmetry and introduce a seesaw relation for the vacuum expectation values (VEVs) of the exotic scalar singlets, which break the U(1) ‧ spontaneously. The larger VEV is responsible for generating the Dirac mass term of the heavy neutrinos, while the smaller for the Majorana mass term. As a result active neutrino masses are generated via the modified inverse seesaw mechanism. The lightest of the new fermion singlets, which are introduced to cancel the U(1) ‧ anomalies, can be a stable particle with ultra flavor symmetry and thus a plausible dark matter candidate. We explore the parameter space with constraints from the dark matter relic abundance and dark matter direct detection.
- Publication:
-
Physics Letters B
- Pub Date:
- October 2015
- DOI:
- 10.1016/j.physletb.2015.08.026
- arXiv:
- arXiv:1408.6064
- Bibcode:
- 2015PhLB..749..458C
- Keywords:
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- High Energy Physics - Phenomenology
- E-Print:
- 14 pages, 4 figures