Neutrino masses and scalar singlet dark matter

Journal Article · 06 March 2017 · Physical Review. D.

DOI: https://doi.org/10.1103/physrevd.95.055003 · OSTI ID:1536241

Bhattacharya, Subhaditya ^[1]; Jana, Sudip ^[2]; Nandi, S. ^[2]

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1. Indian Institute of Technology Guwahati (India); DOE/OSTI
2. Oklahoma State University, Stillwater, OK (United States)

Here We propose a simple extension of the Standard Model (SM) which has a viable dark matter (DM) candidate and can explain the generation of tiny neutrino masses. The DM is an electroweak (EW) singlet scalar S, odd under an imposed exact Z₂ symmetry, that interacts with the SM through the “Higgs portal” coupling, while all other particles are even under Z₂. The model also has an EW isospin 3/2 scalar Δ and a pair of EW isospin vectors Σ and $$\bar{Σ}$$, which are responsible for generating tiny neutrino mass via the effective dimension-seven operator. Thanks to the additional interactions with Δ, 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 the LHC are also discussed.

• Research Organization: Oklahoma State University, Stillwater, OK (United States)
• Sponsoring Organization: Innovation in Science Pursuit for Inspired Research (INSPIRE); USDOE; USDOE Office of Science (SC)
• Grant/Contract Number: SC0016013
• OSTI ID: 1536241
• Report Number(s): OSU-HEP--16-07
• Journal Information: Physical Review. D., Journal Name: Physical Review. D. Journal Issue: 5 Vol. 95; ISSN 2470-0010
• Publisher: American Physical Society (APS)Copyright Statement
• Country of Publication: United States
• Language: English