期刊
JOURNAL OF HIGH ENERGY PHYSICS
卷 -, 期 1, 页码 -出版社
SPRINGER
DOI: 10.1007/JHEP01(2016)087
关键词
Beyond Standard Model; Discrete and Finite Symmetries; Higgs Physics
资金
- Australian Research Council
- IBS [IBS-R018-D1]
- Ministry of Science, ICT & Future Planning, Republic of Korea [IBS-R018-D1-2016-A00] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Semi-annihilation is a generic feature of dark matter theories with symmetries larger than Z(2). We investigate two examples with multi-component dark sectors comprised of an SU(2)(L) singlet or triplet fermion besides a scalar singlet. These are respectively the minimal fermionic semi-annihilating model, and the minimal case for a gauge-charged fermion. We study the relevant dark matter phenomenology, including the interplay of semi-annihilation and the Sommerfeld effect. We demonstrate that semi-annihilation in the singlet model can explain the gamma ray excess from the galactic center. For the triplet model we scan the parameter space, and explore how signals and constraints are modi fied by semi-annihilation. We find that the entire region where the model comprises all the observed dark matter is accessible to current and planned direct and indirect searches.
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