Complementary collider and astrophysical probes of multi-component Dark Matter

Abstract

We study a new physics scenario with two inert and one active scalar doublets, hence a 3-Higgs Doublet Model (3HDM). We impose a $Z_2\times Z_2^{\prime }$ symmetry onto such a 3HDM with one inert doublet odd under the $Z_2$ transformation and the other odd under the $Z_2^{\prime }$ one. Such a construction leads to a two-component Dark Matter (DM) model. It has been shown that, when there is a sufficient mass difference between the two DM candidates, it is possible to probe the light DM candidate in the nuclear recoil energy in direct detection experiments and the heavy DM component in the photon flux in indirect detection experiments. With the DM masses at the electroweak scale, we show that, independently of astrophysical probes, this model feature can be tested at the Large Hadron Collider via scalar cascade decays in $2\ell +{\cancel{E}}_T$ final states. We study several observable distributions whose shapes hint at the presence of the two different DM candidates.

20 pages, 7 figures, 2 tables. arXiv admin note: substantial text overlap with arXiv:2012.11621

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Cited by in corpus (2)

• $U(1)$-charged Dark Matter in three-Higgs-doublet models
• Exploring two component doublet dark matter