LHC and Dark Matter Signals of Improved Naturalness

TL;DR

This paper explores a simple model that accommodates a heavy Higgs boson, consistent with experimental data, and provides a viable dark matter candidate, with implications for LHC and dark matter detection experiments.

Contribution

It introduces a minimal model allowing a heavy Higgs while satisfying electroweak constraints and explaining dark matter, with analysis of its experimental signatures.

Findings

Heavy Higgs compatible with electroweak data

Model predicts detectable dark matter signals

Potential LHC signatures for the new states

Abstract

The Standard Model Higgs suffers from the hierarchy problem, typically implying new states within the reach of the LHC. If the Higgs is very heavy (~500 GeV) the states that cutoff the quadratic divergence may be beyond the reach of the LHC. However, in this case precision electroweak data require the Standard Model to be augmented with new states at the electroweak scale. We study a very simple model, with no new colored states, that allows a heavy Higgs whilst remaining consistent with experiments, and yielding the correct dark matter abundance. We investigate the possibilities for its discovery at the LHC and future dark matter detection experiments.