Composite dark matter phenomenology in the presence of lighter degrees of freedom

TL;DR

This paper explores a composite dark matter model where exotic particles enable dark matter to evade current detection constraints, and proposes future collider strategies to detect these particles.

Contribution

It introduces a novel composite dark matter scenario with lighter degrees of freedom that can escape detection and provides simulation-based analysis for future collider searches.

Findings

Dark matter can freeze out without Standard Model couplings.

Current and future direct detection constraints can be avoided.

Proposed collider analyses target decay signatures of new particles.

Abstract

Scalar singlet dark matter in anomaly-free composite Higgs models is accompanied by exotic particles to which the dark matter annihilates. The latter can therefore freeze out even in the absence of couplings to the Standard Model. In this regime, both current and future direct detection constraints can be avoided. Moreover, due to the different decay modes of the extra particles, the dark matter candidate can even escape indirect detection constraints. Assessing this issue requires dedicated simulations of the gamma ray spectrum, that we provide in the present article in the context of $SO(7)/SO(6)$. For the parameter space region that evades constraints from dark matter experiments, we develop new analyses to be performed at a future 100 TeV collider based on the search of the new particles produced in the decay of heavy vector-like quarks.