Exploring triplet-quadruplet fermionic dark matter at the LHC and future colliders

TL;DR

This paper investigates the detection prospects of a triplet-quadruplet fermionic dark matter model at current and future colliders, analyzing collider signatures and loop effects on precision measurements to explore dark matter parameter space.

Contribution

It introduces a detailed study of collider signatures and loop effects for the triplet-quadruplet fermionic dark matter model, highlighting its testability at future colliders.

Findings

Most parameter regions consistent with dark matter relic density can be probed by future colliders.

Collider signatures include monojet, disappearing track, and multilepton channels.

Loop effects significantly impact precision measurements at the Circular Electron Positron Collider.

Abstract

We study the signatures of the triplet-quadruplet dark matter model at the LHC and future colliders, including the 100 TeV Super Proton-Proton Collider and the 240 GeV Circular Electron Positron Collider. The dark sector in this model contains one fermionic electroweak triplet and two fermionic quadruplets, which have two kinds of Yukawa couplings to the Higgs doublet. Electroweak production signals of the dark sector fermions in the $\text{monojet}+/\!\!\!\!E_\mathrm{T}$, disappearing track, and $\text{multilepton}+/\!\!\!\!E_\mathrm{T}$ channels at the LHC and the Super Proton-Proton Collider are investigated. Moreover, we study the loop effects of this model on the Circular Electron Positron Collider precision measurements of $e^+e^-\to Zh$ and $h\to\gamma\gamma$. We find that most of the parameter regions allowed by the observed dark matter relic density will be well explored by such direct and indirect searches at future colliders.