Probing quadruplet scalar dark matter at current and future $pp$ colliders

Abstract

We investigate a dark matter model involving an inert $\mathrm{SU}(2{)}_{\mathrm{L}}$ quadruplet scalar with hypercharge 1/2. After the electroweak symmetry breaking, the dark sector contains one doubly charged, two singly charged, and two neutral scalars. The lighter neutral scalar can be a viable dark matter candidate. Electroweak production of these scalars at the Large Hadron Collider leads to potential signals in the $\text{monojet}+/E_{\mathrm{T}}$ and $\text{soft-leptons}+\text{jets}+/E_{\mathrm{T}}$ channels. We thus derive constraints on the model by reinterpreting recent experimental searches. Based on simulation, we further evaluate the sensitivity at a future 100 TeV $pp$ collider.

Comments: 29 pages, 9 figures; revisions to match the published version