# The Higgs and WIMP DM Lamp Posts for New Weak Scale Physics: EFT Perspectives and the NMSSM

## TL;DR

This paper uses effective field theory to show how extended Higgs sectors and the NMSSM can produce consistent dark matter relic densities while evading detection limits, and discusses collider search prospects.

## Contribution

It maps EFT results to the NMSSM low-energy limit, highlighting challenging-to-probe singlet sector signatures at the LHC.

## Key findings

- EFT techniques can reconcile relic density with detection constraints.
- NMSSM singlet sector can be mapped to 2HDM+S for collider studies.
- Prospects for mono-Higgs and mono-Z signatures at the LHC are discussed.

## Abstract

I will show, via effective field theory (EFT) techniques, that obtaining an observationally consistent relic density while evading stringent direct detection limits and maintaining $h_{125}$ phenomenology in an extended Higgs sector can be easily achieved. I will then map such an EFT to the low energy limit of the NMSSM with the Higgsinos integrated out. Both the singlino and the singlet-like CP-odd and even scalars in the NMSSM may play a relevant role in such a scenario, while being difficult to probe via conventional searches. The singlet sector of the general NMSSM can be mapped on to a 2HDM+S, and I will discuss prospects of probing this at the LHC using signatures such as mono-Higgs and mono-Z. This proceeding is mostly based on Refs. arXiv:1712.09873 and arXiv:1808.02667.