Heavy Dark Matter Through the Higgs Portal

TL;DR

This paper explores heavy Higgs Portal dark matter models, demonstrating their viability up to 30 TeV, analyzing non-perturbative effects on annihilation, and discussing their potential to evade LHC detection while being accessible to indirect detection experiments.

Contribution

It introduces a Higgs Portal dark matter model with masses up to 30 TeV, including non-perturbative effects, and discusses UV completions within Fat-Higgs models, offering an alternative to MSSM neutralino dark matter.

Findings

Thermal relic abundance achievable up to ~30 TeV.

Large Sommerfeld corrections for masses above ~1 TeV.

Models may evade LHC detection but be probed by indirect detection.

Abstract

Motivated by Higgs Portal and Hidden Valley models, heavy particle dark matter that communicates with the supersymmetric Standard Model via pure Higgs sector interactions is considered. We show that a thermal relic abundance consistent with the measured density of dark matter is possible for masses up to $\sim 30\tev$. For dark matter masses above $\sim 1\tev$, non-perturbative Sommerfeld corrections to the annihilation rate are large, and have the potential to greatly affect indirect detection signals. For large dark matter masses, the Higgs-dark-matter-sector couplings are large and we show how such models may be given a UV completion within the context of so-called "Fat-Higgs" models. Higgs Portal dark matter provides an example of an attractive alternative to conventional MSSM neutralino dark matter that may evade discovery at the LHC, while still being within the reach of current and upcoming indirect detection experiments.