Tau Portal Dark Matter models at the LHC

TL;DR

This paper investigates tau portal dark matter models motivated by gamma-ray excess, analyzing their detectability at the LHC through di-tau plus missing energy signatures, and finds the LHC can probe mediators up to 450 GeV.

Contribution

The study provides the first detailed analysis of LHC signatures for tau portal dark matter models with fermionic mediators, including sensitivity estimates.

Findings

LHC with 3000 fb$^{-1}$ can test tau portal DM models up to 450 GeV.

Constraints from direct detection are considered in the analysis.

Di-tau plus missing energy signatures are promising for discovering tau portal DM.

Abstract

Motivated by the Galactic Center gamma-ray excess in the Fermi-LAT data, we study the signatures of a class of tau portal dark matter (DM) models where DM particles preferentially couple to tau leptons at the LHC. We consider the constraints from the DM direct detection and investigate the sensitivity of the LHC to di-tau plus missing energy signatures. We find that the LHC with a high luminosity of 3000 fb$^{-1}$ can test the tau portal DM models with fermionic mediators in the mass range of $120\sim450$ GeV.