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순수물리이론 연구단
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Smallest halos in thermal wino dark matter

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Title
Smallest halos in thermal wino dark matter
Author(s)
Shin’ichiro Ando; Ayuki Kamada; Toyokazu Sekiguchi; Tomo Takahashi
Publication Date
2019-12
Journal
PHYSICAL REVIEW D, v.100, no.12, pp.123579 -
Publisher
AMER PHYSICAL SOC
Abstract
(Mini) split supersymmetry explains the observed Higgs mass and evades stringent constraints, while keeping good features of TeV-scale supersymmetry other than the little hierarchy problem. Such scenarios naturally predict thermal wino dark matter whose mass is around 3 TeV. Its nonperturbatively enhanced annihilation is a promising target of indirect detection experiments. It is known that identifying the smallest halos is essential for reducing an uncertainty in interpreting indirect detection experiments. Despite its importance, the smallest halos of thermal wino dark matter have not been well understood and thus are investigated in this work. In particular, we remark on two aspects: (1) the neutral wino is in kinetic equilibrium with primordial plasma predominantly through inelastic processes involving the slightly heavier charged wino; and (2) the resultant density contrast shows larger powers at dark acoustic oscillation peaks than in cold dark matter, which is known as an overshooting phenomenon. By taking them into account, we provide a rigorous estimate of the boost factor. Our result facilitates accurately pinning down thermal wino dark matter through vigorous efforts in indirect detection experiments. © 2019 American Physical Society
URI
https://pr.ibs.re.kr/handle/8788114/6737
ISSN
2470-0010
Appears in Collections:
Center for Fundamental Theory(순수물리이론 연구단) > Journal Papers (저널논문)
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