Probing Electroweak Dark Matter at 14 TeV LHC

TL;DR

This paper investigates electroweak dark matter models with new lepton pairs at the 14 TeV LHC, demonstrating potential for exclusion and discovery of dark matter masses up to around 210 GeV through combined collider and direct detection methods.

Contribution

It combines dark matter direct detection with high-luminosity LHC searches to improve constraints on electroweak dark matter models involving new lepton pairs.

Findings

Dark matter masses up to 170-210 GeV can be excluded at 2σ.

Masses up to 175-205 GeV can be discovered at 5σ.

Combined methods enhance detection prospects.

Abstract

Well-motivated electroweak dark matter is often hosted by an extended electroweak sector which also contains new lepton pairs with masses near the weak scale. In this paper, we explore such electroweak dark matter via combining dark matter direct detections and high-luminosity LHC probes of new lepton pairs. Using $Z$- and $W$-associated electroweak processes with two or three lepton final states, we show that dependent on the overall coupling constant, dark matter mass up to $170-210$ GeV can be excluded at $2\sigma$ level and up to $175-205$ GeV can be discovered at $5\sigma$ level at the 14 TeV LHC with integrated luminosities 300 fb$^{-1}$ and 3000 fb$^{-1}$, respectively.