(In)visible Z' and dark matter

TL;DR

This paper explores a model extending the Standard Model with an invisible gauge group, proposing a dark matter candidate that produces detectable gamma-ray signals, providing a potential experimental signature.

Contribution

It introduces a novel extension involving an invisible gauge group and effective operators, linking dark matter to observable gamma-ray signals.

Findings

Viable dark matter candidate identified.

Gamma-ray line signals predicted as observable signatures.

Effective operators connect new gauge sector to Standard Model.

Abstract

We study the consequences of an extension of the standard model containing an invisible extra gauge group under which the SM particles are neutral. We show that effective operators, generated by loops of heavy chiral fermions charged under both gauge groups and connecting the new gauge sector to the Standard Model, can give rise to a viable dark matter candidate. Its annihilations produce clean visible signals through a gamma-ray line. This would be a smoking gun signature of such models observable by actual experiments.