Confined hidden vector dark matter

TL;DR

This paper proposes that stable vector bound states from a confining hidden sector, interacting via the Higgs portal, can serve as viable dark matter candidates with relic densities matching observations for confinement scales of 20-120 TeV.

Contribution

It introduces a model with an SU(2) hidden gauge group and a scalar, demonstrating the stability of vector bound states via custodial symmetry and their viability as dark matter.

Findings

Stable vector bound states are viable dark matter candidates.

Relic density matches WMAP data for confinement scales of 20-120 TeV.

The model links hidden sector confinement scale to dark matter abundance.

Abstract

We argue that the lightest vector bound states of a confining hidden sector communicating with the Standard Model through the Higgs portal are stable and are viable candidates of dark matter. The model is based on an SU(2) gauge group with a scalar field in its fundamental representation and the stability of the lightest vector bound state results from the existence of a custodial symmetry. As the relic density depends essentially on the scale of confinement in the hidden sector, Lambda_HS, agreement with WMAP abundance requires Lambda_HS in the 20-120 TeV range.