Constraints on dark forces from the B factories and low-energy experiments

TL;DR

This paper reviews constraints on MeV-to-GeV dark bosons mediating dark matter interactions, summarizing existing experimental bounds from colliders and fixed-target experiments, and discussing future search sensitivities.

Contribution

It provides a comprehensive overview of current experimental constraints and future prospects for detecting dark vectors and scalars in the MeV-to-GeV mass range.

Findings

Constraints from electron-positron colliders are significant.

Fixed-target experiments place strong bounds on dark bosons.

Future experiments will improve sensitivity to dark force mediators.

Abstract

The idea that dark-matter interactions with Standard-Model particles may be mediated by new bosons with masses in the MeV-to-GeV range took off several years ago. Constraints on such models were soon calculated based on older measurements. Subsequently, active collaborations conducted dedicated searches for these bosons, and new experiments were planned to improve the search sensitivity. In this note I briefly cover the basic models that predict dark vectors and scalars in this mass range, review the constraints from electron-positron colliders, fixed-target experiments, and hadron colliders, and comment on the sensitivities of future experiments.