Effective Field Theory approach to lepto-philic self conjugate dark matter

TL;DR

This paper develops an effective field theory framework to analyze lepto-philic self-conjugate dark matter interactions with leptons, deriving constraints from relic density, detection experiments, and collider data.

Contribution

It introduces a comprehensive EFT approach for lepto-philic dark matter, including interactions up to dimension-8, and explores experimental constraints and collider prospects.

Findings

Constraints on dark matter parameters from relic density and detection data.

Potential to probe dark matter at ILC via mono-photon signatures.

Sensitivity analysis using LEP data for low-mass dark matter.

Abstract

We study the self conjugate dark matter (DM) particles interacting primarily with the standard model leptons in an effective field theoretical frame work. We consider SM gauge invariant effective contact interactions between the Majorana fermion, real scalar and a real vector DM with leptons by evaluating the Wilson coefficients appropriate for interaction terms upto dimension-8 and obtain constraints on the parameters of the theory from the observed relic density, indirect detection observations and from the DM-electron scattering cross-sections in the direct detection experiments. Low energy LEP data has been used to study sensitivity in the pair production of such low mass $\le$ 80 GeV DM particles. Pair production of DM particles of mass $\ge$ 50 GeV in association with mono-photons at the proposed ILC has rich potential to probe such effective operators.