Bound-state effects for dark matter with Higgs-like mediators

Biondini, Simone (2018). Bound-state effects for dark matter with Higgs-like mediators. Journal of High Energy Physics, 2018(6) Springer 10.1007/JHEP06(2018)104

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In this paper we study the impact of a scalar exchange on the dark matter relic abundance by solving a plasma-modified Schr ̈odinger equation. A simplified model is considered where a Majorana dark matter fermion is embedded in a U(1)′ extension of the Standard Model and couples with a dark Higgs via a Yukawa interaction. We find that the dark-Higgs exchange can increase the overclosure bounds significantly. For the largest (smallest) value of the Yukawa coupling examined in this work, the dark matter mass is lifted from 5 TeV (0.55 TeV) to 27 TeV (0.70 TeV).

Item Type:

Journal Article (Original Article)

Division/Institute:

10 Strategic Research Centers > Albert Einstein Center for Fundamental Physics (AEC)
08 Faculty of Science > Institute of Theoretical Physics

UniBE Contributor:

Biondini, Simone

Subjects:

500 Science > 530 Physics

ISSN:

1029-8479

Publisher:

Springer

Language:

English

Submitter:

Esther Fiechter

Date Deposited:

30 Aug 2018 15:40

Last Modified:

27 Oct 2019 22:34

Publisher DOI:

10.1007/JHEP06(2018)104

ArXiv ID:

1805.00353

BORIS DOI:

10.7892/boris.119668

URI:

https://boris.unibe.ch/id/eprint/119668

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