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순수물리이론 연구단
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Fermionic semi-annihilating dark matter

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Title
Fermionic semi-annihilating dark matter
Author(s)
Cai Y.; Andrew Spray
Publication Date
2016-01
Journal
Journal of High Energy Physics, v.2016, no.1, pp.1 - 38
Abstract
Abstract: Semi-annihilation is a generic feature of dark matter theories with symmetries larger than ℤ2. 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 modified 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. © 2016, The Author(s)
URI
http://pr.ibs.re.kr/handle/8788114/2421
DOI
10.1007/JHEP01(2016)087
ISSN
1029-8479
Appears in Collections:
Center for Fundamental Theory(순수물리이론 연구단) > Journal Papers (저널논문)
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