Abelian Hidden Sectors at a GeV

TL;DR

This paper explores how GeV-scale hidden sectors can naturally arise in supersymmetric models through weak coupling and sequestering, with implications for dark matter and collider experiments.

Contribution

It provides detailed mechanisms and models for generating GeV-scale hidden sectors in supersymmetry, including kinetic mixing and loop effects, with phenomenological applications.

Findings

GeV-scale hidden sectors can be generated via gauge and gaugino mediation.

Kinetic mixing enables interactions between hidden and visible sectors.

Potential relevance for dark matter and collider phenomenology.

Abstract

We discuss mechanisms for naturally generating GeV-scale hidden sectors in the context of weak-scale supersymmetry. Such low mass scales can arise when hidden sectors are more weakly coupled to supersymmetry breaking than the visible sector, as happens when supersymmetry breaking is communicated to the visible sector by gauge interactions under which the hidden sector is uncharged, or if the hidden sector is sequestered from gravity-mediated supersymmetry breaking. We study these mechanisms in detail in the context of gauge and gaugino mediation, and present specific models of Abelian GeV-scale hidden sectors. In particular, we discuss kinetic mixing of a U(1)_x gauge force with hypercharge, singlets or bi-fundamentals which couple to both sectors, and additional loop effects. Finally, we investigate the possible relevance of such sectors for dark matter phenomenology, as well as for low- and high-energy collider searches.