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

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arxiv 1805.00353 v2 pith:TNDLBVE5 submitted 2018-05-01 hep-ph

Simone Biondini This is my paper · ORCID
classification hep-ph
keywords darkmatterexchangemodelyukawaabundancebound-statebounds
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abstract

In this paper we study the impact of a scalar exchange on the dark matter relic abundance by solving a plasma-modified Schroedinger 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).

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Cited by 1 Pith paper

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  1. Effective field theories for dark matter pairs in the early universe: Debye mass effects

    hep-ph 2025-01 conditional novelty 7.0 of 10

    Debye mass resummation reduces bound-state dark matter depletion by up to a factor of two relative to fixed-order NLO, changing relic abundance predictions by a few percent.

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