Resolving phenomenological problems with strongly-interacting-massive-particle models with dark vector resonances

TL;DR

This paper explores dark matter models involving strongly interacting particles with dark vector resonances, demonstrating how these resonances help achieve the correct relic density through unitarization in dark chiral perturbation theory.

Contribution

It introduces a dark matter model with dark vector mesons that unitarize dark chiral perturbation theory, ensuring accurate relic density calculations.

Findings

Dark vector mesons effectively unitarize dark ChPT.

Relic density conditions are accurately determined within the model.

Dark pions serve as viable SIMP dark matter candidates.

Abstract

We consider a light dark matter candidate which is produced by the freeze-out mechanism with $3\rightarrow2$ annihilations, the so called Strongly Interacting Massive Particles (SIMPs). SIMPs are identified as dark pions in dark chiral perturbation theory (ChPT) where both light mass and strong coupling needed for SIMPs can be realized by strong dynamics. In QCD-like theories with $SU(3)_L \times SU(3)_R /SU(3)_V$ flavor symmetry, including dark vector mesons in the hidden local symmetry scheme, we illustrate that dark vector mesons unitarize the dark ChPT efficiently, thus determine the correct relic density condition within the validity of the dark ChPT.