Wino-like Minimal Dark Matter and future colliders

TL;DR

This paper investigates the detection prospects of a Wino-like minimal dark matter candidate, extending the Standard Model with an electroweak fermion triplet, at future colliders including the HL-LHC and a 100 TeV collider.

Contribution

It provides a detailed analysis of the collider reach for a minimal dark matter model with an electroweak triplet, including projections for various detection channels and future collider sensitivities.

Findings

Disappearing tracks can probe up to 3 TeV at 100 TeV colliders.

Other channels extend sensitivity up to 1.3-1.7 TeV with high luminosity.

The model serves as a benchmark for WIMP dark matter detection prospects.

Abstract

We extend the Standard Model with an EW fermion triplet, stable thanks to one of the accidental symmetries already present in the theory. On top of being a potential Dark Matter candidate, additional motivations for this new state are the stability of the vacuum, the fact it does not introduce a large fine-tuning in the Higgs mass, and that it helps with gauge coupling unification. We perform an analysis of the reach for such a particle at the high-luminosity LHC, and at a futuristic 100 TeV pp collider. We do so for the monojet, monophoton, vector boson fusion and disappearing tracks channels. At 100 TeV, disappearing tracks will likely probe the mass region of 3 TeV, relevant for thermally produced Dark Matter. The reach of the other channels is found to extend up to ~ 1.3 (1.7) TeV for 3 (30) ab^-1 of integrated luminosity, provided systematics are well under control. This model also constitutes a benchmark of a typical WIMP Dark Matter candidate, and its phenomenology reproduces that of various models of Supersymmetry featuring a pure Wino as the lightest sparticle.