BROWSE

Related Scientist

Researcher

Andrew Spray
순수물리이론 연구단
more info

A systematic effective operator analysis of semi-annihilating dark matter

Cited 2 time in webofscience Cited 0 time in scopus
181 Viewed 45 Downloaded
Title
A systematic effective operator analysis of semi-annihilating dark matter
Author(s)
Yi Cai; Andrew Spray
Publication Date
2017-02
Journal
JOURNAL OF HIGH ENERGY PHYSICS, v.2017, no.2, pp.120 -
Publisher
SPRINGER
Abstract
Semi-annihilation is a generic feature of dark matter theories stabilized by symmetries larger than a ℤ2. It contributes to thermal freeze out, but is irrelevant for direct and collider searches. This allows semi-annihilating dark matter to avoid those limits in a natural way. We use an effective operator approach to make the first model-independent study of the associated phenomenology. We enumerate all possible operators that contribute to 2 → 2 semi-annihilation up to dimension 6, plus leading terms at dimension 7. We find that when the only light states charged under the dark symmetry are dark matter, the model space is highly constrained. Only fifteen operators exist, and just two for single-component dark sectors. If there can be additional light, unstable “dark partner” states the possible phenomenology greatly increases, at the cost of additional model dependence in the dark partner decay modes. We also derive the irreducible constraints on models with single-component dark matter from cosmic ray searches and astrophysical observations. We find that for semi-annihilation to electrons and light quarks, the thermal relic cross sections can be excluded for dark matter masses up to 100 GeV. However, significant model space for semi-annihilating dark matter remains. © 2017, The Author(s)
URI
http://pr.ibs.re.kr/handle/8788114/3398
DOI
10.1007/JHEP02(2017)120
ISSN
1029-8479
Appears in Collections:
Center for Fundamental Theory(순수물리이론 연구단) > Journal Papers (저널논문)
Files in This Item:
A systematic effective operator analysis of semi-annihilating dark matter.pdfDownload

qrcode

  • facebook

    twitter

  • Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.
해당 아이템을 이메일로 공유하기 원하시면 인증을 거치시기 바랍니다.

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse