Dark matter direct detection with spin-2 mediators

TL;DR

This paper explores models where a massive spin-two particle mediates interactions between dark matter and Standard Model particles, revealing new interaction types and analyzing their implications for detection and collider experiments.

Contribution

It introduces novel dark matter-SM interactions mediated by a spin-two resonance and analyzes their effects on direct detection, relic density, and collider constraints.

Findings

Identified new DM-SM interaction types via spin-2 mediators

Mapped effective interactions to gravitational form factors

Discussed constraints from relic density, direct detection, and colliders

Abstract

We consider models where a massive spin-two resonance acts as the mediator between Dark Matter (DM) and the SM particles through the energy-momentum tensor. We examine the effective theory for fermion, vector and scalar DM generated in these models and find novel types of DM-SM interaction never considered before. We identify the effective interactions between DM and the SM quarks when the mediator is integrated out, and match them to the gravitational form factors relevant for spin-independent DM-nucleon scattering. We also discuss the interplay between DM relic density conditions, direct detection bounds and collider searches for the spin-two mediator.