Singlet-Doublet Dark Matter

TL;DR

This paper investigates singlet-doublet dark matter models with fermions and scalars, analyzing current experimental constraints and future detection prospects, emphasizing the importance of upcoming experiments like XENON100 and DeepCore.

Contribution

It provides a comparative analysis of fermionic and scalar singlet-doublet dark matter models under current experimental constraints and evaluates future detection prospects.

Findings

Fermion models are highly constrained by XENON100 results.

Scalar models are less constrained and more promising for future detection.

Next-generation experiments will probe much of the remaining parameter space.

Abstract

In light of recent data from direct detection experiments and the Large Hadron Collider, we explore models of dark matter in which an SU(2) doublet is mixed with a Standard Model singlet. We impose a thermal history. If the new particles are fermions, this model is already constrained due to null results from XENON100. We comment on remaining regions of parameter space and assess prospects for future discovery. We do the same for the model where the new particles are scalars, which at present is less constrained. Much of the remaining parameter space for both models will be probed by the next generation of direct detection experiments. For the fermion model, DeepCore may also play an important role.