Neutrino Masses and Scalar Singlet Dark Matter

Abstract

We propose a simple extension of the Standard Model (SM) which has a viable dark matter (DM) candidate, as well as can explain the generation of tiny neutrino masses. The DM is an electroweak (EW) singlet scalar $S$, odd under an imposed exact $Z_2$ symmetry, interacting to SM through `Higgs-portal' coupling, while all other particles are even under $Z_2$. The model also has an EW isospin $3/2$ scalar, $\Delta$ and a pair of EW isospin vector, $\Sigma$ and $\bar{\Sigma }$, responsible for generating tiny neutrino mass via the effective dimension seven operator. Thanks to the additional interactions with $\Delta$, the scalar singlet DM $S$ survives a large region of parameter space by relic density constraints from WMAP/PLANCK and direct search bounds from updated LUX data. Constraints on the model from Large Hadron Collider (LHC) has also been discussed.

Published version in PRD with some additional references; Discussion on the discrete anomaly is included

References in corpus (8)

• Dark Matter Results from 225 Live Days of XENON100 Data
• Gauge Singlet Scalars as Cold Dark Matter
• micrOMEGAs4.1: two dark matter candidates
• New Mechanism for Neutrino Mass Generation and Triply Charged Higgs Bosons at the LHC
• The real singlet scalar dark matter model
• Extending two-Higgs-doublet models by a singlet scalar field - the Case for Dark Matter
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Cited by in corpus (5)

• Probing Doubly Charged Higgs Bosons at the LHC through Photon Initiated Processes
• Electroweak vacuum stability in presence of singlet scalar dark matter in TeV scale seesaw models
• Thick Branes in Extra Dimensions and Suppressed Dark Couplings
• Long-lived doubly charged scalars in the left-right symmetric model: catalyzed nuclear fusion and collider implications
• Direct production of SM-singlet scalars at the muon collider