Global Fits of Dirac Dark Matter Effective Field Theories

TL;DR

This paper performs a comprehensive global analysis of Dirac fermion dark matter effective field theories, combining multiple experimental constraints to identify viable parameter regions, especially for DM masses above 100 GeV.

Contribution

It provides the first combined global fit of dimension-6 Dirac fermion DM EFT operators using the GAMBIT framework with latest experimental data.

Findings

DM mass below 100 GeV cannot satisfy all constraints simultaneously

For DM masses above 100 GeV, large viable parameter regions exist

EFT remains valid in these viable regions

Abstract

In this proceeding, we present results from a global fit of Dirac fermion dark matter (DM) effective field theory (EFT) based on arXiv:2106.02056 using the GAMBIT framework. Here we show results only for the dimension-6 operators that describe the interactions between a gauge-singlet Dirac fermion and Standard Model quarks. Our global fit combines the latest constraints from \textit{Planck}, direct and indirect DM detection, and the LHC. For DM mass below 100 GeV, it is impossible to simultaneously satisfy all constraints while maintaining the EFT validity at high energies. For higher masses, however, large regions of parameter space remain viable where the EFT is valid and saturates the observed DM abundance.