Singlet Majorana fermion dark matter, DAMA, CoGeNT, and CDMS-II
- Departamento de Fisica, Universidade Federal da Paraiba, Caixa Postal 5008, 58051-970, Joao Pessoa - PB (Brazil)
We propose a model where a sterile Majorana fermion with mass in the range of 10 GeV-1 TeV can account for the whole amount of dark matter in the Universe. The model involves a right-handed singlet Majorana fermion as a weakly interacting massive particle, a charged and a neutral scalar, and all singlets by the standard model symmetry and makes use of a discrete symmetry in order to guarantee the singlet fermion stability. Also, motivated by the recent results reported by CoGeNT and CDMS-II experiments concerning excess events of the expected background, and the intriguing annual modulation observed by DAMA, we look for a possible explanation to some of these experiments. Our results show that there is a lot of room in the parameter space to make this sterile Majorana fermion a viable dark matter candidate, and, if it is realized in nature, it is also capable of explaining DAMA annual modulation signal and/or CoGeNT excess events or CDMS-II excess event candidates. Besides, a light Higgs boson is preferred in this scenario.
- OSTI ID:
- 21503665
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 82, Issue 10; Other Information: DOI: 10.1103/PhysRevD.82.105014; (c) 2010 American Institute of Physics; ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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FERMIONS
GEV RANGE
HIGGS BOSONS
MAJORANA THEORY
MASS
MODULATION
NONLUMINOUS MATTER
PARTICLES
SPACE
STABILITY
STANDARD MODEL
SYMMETRY
UNIVERSE
WEAK INTERACTIONS
BASIC INTERACTIONS
BOSONS
ELEMENTARY PARTICLES
ENERGY RANGE
FIELD THEORIES
GRAND UNIFIED THEORY
INTERACTIONS
MATHEMATICAL MODELS
MATTER
PARTICLE MODELS
POSTULATED PARTICLES
QUANTUM FIELD THEORY
UNIFIED GAUGE MODELS