EW scale DM models with dark gauge symmetries

TL;DR

This paper discusses electroweak scale dark matter models stabilized by dark gauge symmetries, emphasizing their unique features, dynamics, and implications for collider searches, contrasting them with simpler phenomenological models.

Contribution

It introduces dark matter models with local dark gauge symmetries, detailing their structure, stability mechanisms, and the importance of full SM gauge symmetry for accurate collider phenomenology.

Findings

Dark gauge symmetries can stabilize or prolong dark matter lifetimes.

Dark gauge bosons and Higgs bosons are integral to these models.

Full SM gauge symmetry is crucial for collider search strategies.

Abstract

In this talk, I describe a class of electroweak (EW) scale dark matter (DM) models where its stability or longevity are the results of underlying dark gauge symmetries: stable due to unbroken local dark gauge symmetry or topology, or long-lived due to the accidental global symmetry of dark gauge theories. Compared with the usual phenomenological dark matter models (including DM EFT or simplified DM models), DM models with local dark gauge symmetries include dark gauge bosons, dark Higgs bosons and sometimes excited dark matter. And dynamics among these fields are completely fixed by local gauge principle. The idea of singlet portals including the Higgs portal can thermalize these hidden sector dark matter very efficiently, so that these DM could be easily thermal DM. I also discuss the limitation of the usual DM effective field theory or simplified DM models without the full SM gauge symmetry, and emphasize the importance of the full SM gauge symmetry and renormalizability especially for collider searches for DM.