Phenomenological constraints on light mixed sneutrino dark matter scenarios

TL;DR

This paper explores how light mixed sneutrino dark matter candidates in supersymmetric models can be constrained by phenomenological considerations and future collider measurements, especially when direct detection is weak.

Contribution

It provides a detailed analysis of parameter space constraints for GeV-scale mixed sneutrino dark matter, emphasizing the role of Higgs measurements at future colliders.

Findings

Allowed regions are constrained by vacuum stability bounds.

Future collider experiments can probe these parameter regions.

Weak direct detection sensitivity makes collider measurements crucial.

Abstract

In supersymmetric models with Dirac neutrinos, the lightest sneutrino can be an excellent thermal dark matter candidate when the soft sneutrino trilinear parameter is large. We focus on scenarios where the mass of the mixed sneutrino is of the order of GeV and sensitivity of dark matter direct detection is weak. We investigate phenomenological constraints on the model parameter space including the vacuum stability bound. We show that the allowed regions can be explored by measuring Higgs boson properties at future collider experiments.