Singlet-doublet dark matter revisited

TL;DR

This paper reexamines the singlet-doublet dark matter model considering recent direct detection constraints, identifying viable parameter regions and collider signatures, and exploring their theoretical origins via renormalization group evolution.

Contribution

It provides a detailed analysis of the remaining parameter space of the singlet-doublet model under current experimental limits and discusses the theoretical realization of these regions.

Findings

Identified parameter regions with suppressed direct detection signals.

Discussed collider signatures accessible at the LHC.

Explored the RG evolution of parameters from UV initial conditions.

Abstract

The singlet-doublet model is an economical model of weakly interacting dark matter. We revisit it in light of improved dark matter direct detection limits. We characterize the now well-defined regions of remaining parameter space with suppressed direct detection cross sections and discuss features of the spectrum accessible at the Large Hadron Collider. We discuss when and how parameters in these special regions might be realized as the result of renormalization group evolution when starting with generic ultraviolet initial conditions.