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Vector Higgs-portal dark matter and Fermi-LAT gamma ray line.
- Source :
-
Physical Review D: Particles, Fields, Gravitation & Cosmology . Jun2013, Vol. 87 Issue 12-A, p1-11. 11p. - Publication Year :
- 2013
-
Abstract
- We propose a renormalizable model for vector dark matter with extra U(1) gauge symmetry, which is broken by the vacuum expectation value of a complex singlet scalar. When the singlet scalar has a quartic coupling to a heavy charged scalar, the resonance effect enhances the annihilation cross section of vector dark matter into two photons such that a Fermi gamma ray line at about 130 GeV is obtained. In the presence of a tiny mixing between the singlet scalar and the Standard Model Higgs doublet, the relic density is determined dominantly by WW/ZZ and two-photon channels near the resonance pole of the singlet scalar. We also show that various phenomenological bounds coming from the Higgs-to-diphoton decay rate, precision data, and collider searches for the charged scalar and vacuum stability are satisfied in the model. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 24700010
- Volume :
- 87
- Issue :
- 12-A
- Database :
- Academic Search Index
- Journal :
- Physical Review D: Particles, Fields, Gravitation & Cosmology
- Publication Type :
- Periodical
- Accession number :
- 89686104
- Full Text :
- https://doi.org/10.1103/PhysRevD.87.123541