Complementary Search of Fermionic Absorption Operators at Hadron Collider and Direct Detection Experiments

TL;DR

This paper investigates the detection of fermionic dark matter through absorption operators at colliders and direct detection experiments, providing model-independent constraints and comparing collider signals with neutrino experiment sensitivities.

Contribution

It introduces a model-independent framework for analyzing fermionic dark matter absorption operators at colliders and compares these constraints with direct detection and neutrino experiments.

Findings

Light nuclear targets yield stronger constraints on absorption operators.

Collider mono-X searches can effectively probe fermionic dark matter.

Comparison with neutrino experiments like Borexino enhances detection prospects.

Abstract

Instead of the energy recoil signal at direct detection experiments, dark fermion appears as missing energy at hadron colliders. For a fermionc dark sector particle that coupled with quarks and neutrino via absorption operators, its production at collider is accompanied by an invisible neutrino. We study in details the mono-$X$ (photon, jet, and $Z$) productions at the Large Hadron Collider (LHC). We start from the quark-level absorption operators to make easy comparison between the collider and direct detection experiments. In other words, we study the model-independent constraints on a dark fermion with absorption operator. In addition, the interplay and comparison with the possible detection at the neutrino experiments, especially Borexino, is also briefly discussed. We find that light nuclear target can provide the stronger constraints on both spin-dependent and spin-independent absorption operators.