Upper Bound on Parity Breaking Scale for Doublet WIMP Dark Matter

TL;DR

This paper establishes an upper bound of 25-60 TeV on the Parity symmetry breaking scale in a WIMP dark matter model, with implications for collider and detection experiments.

Contribution

It introduces a Parity extension of $SU(2)_L$-doublet fermion dark matter and derives the upper bound on the symmetry breaking scale based on phenomenological analysis.

Findings

Parity breaking scale bounded at 25-60 TeV

Collider and detection experiments can probe the parameter space

Dark matter coannihilation affects the bound

Abstract

We consider weakly interacting massive particle (WIMP) dark matter in a Parity solution to the strong CP problem. The WIMP phenomenology can be drastically affected by the presence of Parity partners of the WIMP and electroweak gauge bosons. We focus on a Parity extension of $SU(2)_L$-doublet fermion dark matter, identify the viable parameter space, and derive the predictions of the theory. We find that the Parity symmetry breaking scale is bounded from above, with the bound given by $25-60$ TeV, depending on whether or not dark matter and its Parity partner coannihilate with each other. The High-Luminosity Large Hadron Collider, future colliders, and direct and indirect detection experiments can probe the parameter space further, with correlated signal rates.