Signature of Sub GeV Dark Matter particles at LHC and TEVATRON

TL;DR

This paper explores the potential for detecting sub-GeV dark matter particles at LHC and Tevatron, focusing on the production of colored messengers and their signatures, which could help constrain dark matter models.

Contribution

It demonstrates that light dark matter particles could be copiously produced at LHC if certain colored messengers are light, and proposes kinematic signatures to distinguish signals from background.

Findings

Up to a million events could be produced with 500 GeV messenger mass.

Searches for Fq production are promising even if Fq is above a few TeV.

Most of the Fq mass range can be constrained using LHC data.

Abstract

In this letter, we investigate the production of light dark matter particles at LHC in light of the model (N = 2 SUSY inspired) proposed in Ref. [1] and demonstrate that they will be copiously produced if the colored messengers Fq are lighter than 1 TeV. We expect up to a million events if the Fq mass is about 500 GeV, assuming a ~1 inverse fb luminosity. In addition, we show that, even if the Fq mass is above a few TeV, searches for Fq production at LHC are promising because a kinematical signature can be used to separate the signal from background. This signature is similar to that expected in supersymmetric scenarios. Hence, our study shows that most of the Fq mass range could be constrained using LHC data. This should encourage further studies since they could infirm/confirm the MeV DM scenario.