Loop-induced direct detection signatures from CP-violating scalar mediators
書誌事項
- 公開日
- 2019-06
- 権利情報
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- https://creativecommons.org/licenses/by/4.0/
- https://creativecommons.org/licenses/by/4.0/
- DOI
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- 10.1007/jhep06(2019)052
- 公開者
- Springer Science and Business Media LLC
説明
<jats:title>A<jats:sc>bstract</jats:sc> </jats:title> <jats:p>We investigate direct detection signatures of dark matter particles interacting with quarks via a light spin-0 mediator with general CP phases. Since tree-level scattering may be strongly suppressed in the non-relativistic limit, loop contributions play an important role and can lead to observable signals in near-future experiments. We study the phenomenology of different mediator masses and CP phases with an emphasis on scenarios with maximal CP violation and Higgs portal models. Intriguingly, the sum of the rates obtained at tree- and loop-level can give a characteristic recoil spectrum not obtainable from a single type of interaction. We furthermore develop a novel method for decomposing the two-loop contribution to effective interactions between dark matter and gluons into two separate one-loop diagrams, which in our case substantially simplifies the calculation of the important top-quark contribution.</jats:p>
収録刊行物
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- Journal of High Energy Physics
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Journal of High Energy Physics 2019 (6), 052-, 2019-06
Springer Science and Business Media LLC
