# Constraints on mediator-based dark matter and scalar dark energy models using $\sqrt s = 13$ TeV $pp$ collision data collected by the ATLAS detector

## TL;DR

This paper presents constraints on various dark matter and dark energy models using ATLAS collider data at 13 TeV, interpreting results across multiple mediator types and extended Higgs sector models, including implications for dark energy.

## Contribution

It provides the first interpretation of collider data constraints on light scalar particles related to dark energy models, alongside dark matter mediator constraints.

## Key findings

- Constraints on spin-1 and spin-0 mediators from collider data
- Limits set on extended Higgs sector models with additional mediators
- First-time interpretation of collider results for dark energy scalar particles

## Abstract

Constraints on selected mediator-based dark matter models and a scalar dark energy model using up to $37~\mathrm{fb}^{-1}$ $\sqrt s = 13$ TeV $pp$ collision data collected by the ATLAS detector at the LHC during 2015-2016 are summarised in this paper. The results of experimental searches in a variety of final states are interpreted in terms of a set of spin-1 and spin-0 single-mediator dark matter simplified models and a second set of models involving an extended Higgs sector plus an additional vector or pseudo-scalar mediator. The searches considered in this paper constrain spin-1 leptophobic and leptophilic mediators, spin-0 colour-neutral and colour-charged mediators and vector or pseudo-scalar mediators embedded in extended Higgs sector models. In this case, also $\sqrt s = 8$ TeV $pp$ collision data are used for the interpretation of the results. The results are also interpreted for the first time in terms of light scalar particles that could contribute to the accelerating expansion of the universe (dark energy).