Singlet-Triplet Fermionic Dark Matter and LHC Phenomenology

TL;DR

This paper explores a modified fermionic dark matter model involving singlet and triplet particles, demonstrating its potential detectability at the LHC and in direct detection experiments, unlike the pure triplet model which requires very heavy masses.

Contribution

It introduces an extended fermionic dark matter model with lower mass viability and analyzes its collider and direct detection prospects, providing new testable predictions.

Findings

Lower mass dark matter can be produced at LHC with detectable signals.

The model's signals can be observed in multi-jet plus missing energy channels.

The model is testable by current and future direct detection experiments.

Abstract

It is well known that for the pure standard model triplet fermionic WIMP-type dark matter (DM), the relic density is satisfied around 2 TeV. For such a heavy mass particle, the production cross-section at 13 TeV run of LHC will be very small. Extending the model further with a singlet fermion and a triplet scalar, DM relic density can be satisfied for even much lower masses. The lower mass DM can be copiously produced at LHC and hence the model can be tested at collider. For the present model we have studied the multi jet ($\geq 2\,j$) + missing energy ($\cancel{E}_{T}$) signal and show that this can be detected in the near future of the LHC 13 TeV run. We also predict that the present model is testable by the earth based DM direct detection experiments like Xenon-1T and in future by Darwin.