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Phenomenology of the dark matter sector in the 2HDM extended with complex scalar singlet

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arxiv 2203.05509 v4 pith:R5U5ZKLY submitted 2022-03-10 hep-ph

classification hep-ph
keywords darkmattercomplexhdmsscalarsingletcandidatemodel
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

The two-Higgs-doublet model augmented with a complex scalar singlet (2HDMS) is a well-motivated candidate for Beyond Standard Model (BSM) Physics. We investigate the dark matter phenomenology of the 2HDMS with the complex scalar singlet as the dark matter candidate. We perform a study of the parameter space allowed by existing theoretical and experimental constraints from dark matter, flavour physics and collider searches. Further, we discuss a few benchmark scenarios to test the discovery potential for the 2HDMS at the HL-LHC and at future high-energy $e^+e^-$ colliders.

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