Prompt searches for feebly interacting particles at the LHC

TL;DR

This paper reviews recent ATLAS and CMS searches at the LHC for feebly interacting particles like dark matter and dark photons, highlighting new exclusion limits and first collider constraints based on 2015-2018 data.

Contribution

It presents the latest experimental results from ATLAS and CMS on feebly interacting particles, extending the parameter space and providing first collider constraints for several models.

Findings

Extended exclusion limits on feebly interacting particles.

First collider-based constraints for certain models.

Significant probing of dark sector parameter space.

Abstract

Recent results from the ATLAS and CMS experiments in searches for prompt signatures of feebly interacting particles are presented. All presented results are based on the 2015-2018 data set of $13\,\mathrm{TeV}$ proton-proton collisions, corresponding to an integrated luminosity of about $140\,\mathrm{fb}^{-1}$. The discussed models include dark mesons, heavy neutral leptons, dark matter, and dark photons. The obtained exclusion limits significantly extend the probed parameter space and, in some cases, provide the first collider-based constraints for the considered models.