# Exploring Spin-3/2 Dark Matter with Effective Higgs Couplings

## TL;DR

This paper investigates a spin-3/2 dark matter model interacting with the Higgs boson through effective couplings, analyzing its viability against experimental constraints and comparing it to spin-1/2 dark matter scenarios.

## Contribution

It introduces and analyzes a novel spin-3/2 dark matter model with effective Higgs couplings, assessing its experimental viability and similarities to spin-1/2 models.

## Key findings

- Viable for dark matter masses from 58 GeV to 2.3 TeV.
- Pseudoscalar couplings can make parts of the parameter space elusive.
- Model will be further tested by upcoming experiments.

## Abstract

We study an economical model of weakly-interacting massive particle dark matter (DM) which has spin 3/2 and interacts with the 125-GeV Higgs boson via effective scalar and pseudoscalar operators. We apply constraints on the model from the relic density data, LHC measurements of the Higgs boson, and direct and indirect searches for DM, taking into account the effective nature of the DM-Higgs couplings. We show that this DM is currently viable in most of the mass region from about 58 GeV to 2.3 TeV and will be probed more stringently by ongoing and upcoming experiments. Nevertheless, the presence of the DM-Higgs pseudoscalar coupling could make parts of the model parameter space elusive from future tests. We find that important aspects of this scenario are quite similar to those of its more popular spin-1/2 counterpart.