Closing in on Supersymmetric Electroweak Baryogenesis with Dark Matter Searches and the Large Hadron Collider

TL;DR

This paper examines how recent dark matter searches constrain supersymmetric models that support electroweak baryogenesis, highlighting the exclusion of wino-like dark matter and prospects for bino-like dark matter detection, along with collider production predictions.

Contribution

It provides a detailed analysis of parameter regions compatible with successful electroweak baryogenesis under current dark matter constraints and predicts collider signatures at the LHC.

Findings

Dark matter searches exclude wino-like LSP in EWB regions.

Bino-like dark matter remains viable but is increasingly constrained.

Calculated chargino and neutralino production cross sections at the LHC.

Abstract

We study the impact of recent direct and indirect searches for particle dark matter on supersymmetric models with resonant neutralino- or chargino-driven electroweak baryogenesis (EWB) and heavy sfermions. We outline regions of successful EWB on the planes defined by gaugino and higgsino mass parameters, and calculate the portions of those planes excluded by dark matter search results, and the regions soon to be probed by current and future experiments. We conclude that dark matter searches robustly exclude a wino-like lightest supersymmetric particle in successful EWB regions. Bino-like dark matter is still a possibility, although one that will be probed with a modest improvement in the sensitivity of current direct and indirect detection experiments. We also calculate the total production cross section of chargino and neutralino pairs at the Large Hadron Collider, with a center of mass energy of 7 and 14 TeV.