Invisible Higgs and Dark Matter

TL;DR

This paper explores a model where a weakly interacting fermion could account for dark matter and cause the Higgs boson to decay invisibly, but current experimental constraints significantly limit this possibility.

Contribution

It introduces a minimal walking technicolor model linking dark matter and Higgs decay, analyzing its viability under existing experimental constraints.

Findings

Large parts of the parameter space are excluded by current data.

The scenario is heavily constrained by electroweak precision tests.

The model's viability is limited but still possible in certain regions.

Abstract

We investigate the possibility that a massive weakly interacting fermion simultaneously provides for a dominant component of the dark matter relic density and an invisible decay width of the Higgs boson at the LHC. As a concrete model realizing such dynamics we consider the minimal walking technicolor, although our results apply more generally. Taking into account the constraints from the electroweak precision measurements and current direct searches for dark matter particles, we find that such scenario is heavily constrained, and large portions of the parameter space are excluded.