Vector Higgs-portal dark matter and Fermi-LAT gamma ray line
- Authors
- Choi, Ki-Young; Lee, Hyun Min; Seto, Osamu
- Issue Date
- Jun-2013
- Publisher
- AMER PHYSICAL SOC
- Citation
- PHYSICAL REVIEW D, v.87, no.12
- Journal Title
- PHYSICAL REVIEW D
- Volume
- 87
- Number
- 12
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/50179
- DOI
- 10.1103/PhysRevD.87.123541
- ISSN
- 1550-7998
1550-2368
- 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.
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Collections - College of Natural Sciences > Department of Physics > 1. Journal Articles
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