Twin Quark Dark Matter From Cogenesis

TL;DR

This paper proposes a novel twin Higgs model with a new dark matter candidate and a mechanism for co-generating matter-antimatter asymmetry, linking naturalness, dark matter, and baryogenesis.

Contribution

It introduces a twin color symmetry breaking mechanism producing asymmetric dark matter and a shared matter-antimatter asymmetry via singlet fermion decays.

Findings

Identifies a viable dark matter candidate as twin-color-singlet quarks and twin leptons.

Evaluates experimental constraints and potential discovery signals.

Connects mechanisms for naturalness, dark matter, and baryogenesis.

Abstract

We extend the fraternal twin Higgs scenario to include a novel dark matter candidate as well as a mechanism for generating a matter/antimatter asymmetry in both sectors. A spontaneous breaking of twin color results in quark degrees of freedom that are singlets under the residual twin color group. These twin-color-singlet quarks, along with a subdominant component of twin leptons, constitute the asymmetric dark matter. The asymmetry between matter in antimatter in both sectors is co-generated from the decay of singlet fermions that provide an additional portal between the visible and twin sectors. We discuss the phenomenological aspects of this model, evaluating constraints on the parameter space and highlighting promising discovery channels in future experiments. We briefly discuss how the discovery of signals in multiple experiments may help establish the connection between the mechanisms that address the naturalness, dark matter and matter/antimatter asymmetry puzzles.