Closing in on singlet scalar dark matter: LUX, invisible Higgs decays and gamma-ray lines
- Chinese Academy of Sciences, Nanjing (China)
- Univ. of California, Santa Cruz, CA (United States)
- Tel-Aviv Univ., Tel-Aviv (Israel)
Here, we study the implications of the Higgs discovery and of recent results from dark matter searches on real singlet scalar dark matter. The phenomenology of the model is defined by only two parameters, the singlet scalar mass m S and the quartic coupling a 2 between the SU(2) Higgs and the singlet scalar. We concentrate on the window 5 < m S /GeV < 300. The most dramatic impact on the viable parameter space of the model comes from direct dark matter searches with LUX, and, for very low masses in the few GeV range, from constraints from the invisible decay width of the Higgs. In the resonant region the best constraints come from gamma-ray line searches. We show that they leave only a small region of viable parameter space, for dark matter masses within a few percent of half the mass of the Higgs. We demonstrate that direct and indirect dark matter searches (especially the search for monochromatic gamma-ray lines) will play a key role in closing the residual parameter space in the near future.
- Research Organization:
- Univ. of California, Santa Cruz, CA (United States)
- Sponsoring Organization:
- USDOE
- Grant/Contract Number:
- SC0010107
- OSTI ID:
- 1444076
- Journal Information:
- Journal of High Energy Physics (Online), Vol. 2015, Issue 3; ISSN 1029-8479
- Publisher:
- Springer BerlinCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Similar Records
Gauge singlet scalar as inflaton and thermal relic dark matter
Low-mass right-handed sneutrino dark matter: SuperCDMS and LUX constraints and the Galactic Centre gamma-ray excess