LHC Run-3, $b-\tau$ Yukawa Unification and Dark Matter Implications in SUSY 4-2-2 model

TL;DR

This paper investigates various dark matter co-annihilation scenarios within the SUSY 4-2-2 model, demonstrating their consistency with Yukawa unification, experimental constraints, and potential detectability at LHC Run-3.

Contribution

It presents the first detailed analysis of sbottom-neutralino co-annihilation in this model and explores multiple other co-annihilation and resonance scenarios consistent with experimental data.

Findings

Sbottom-neutralino co-annihilation with sbottom mass around 2 TeV.

Gluino-neutralino and stop-neutralino masses between 1-3.5 TeV.

Stau and chargino masses up to 3.5 TeV, A-resonance solutions up to 3.5 TeV.

Abstract

We revisit the bottom and $\tau$ Yukawa coupling unification in supersymmetric $4$-$2$-$2$ model and present for the first time the sbottom-neutralino co-annihilation scenario consistent with the bottom and $\tau$ Yukawa coupling unification. In addition, we show gluino-neutralino, stop-neutralino, stau-neutralino, chargino-neutralino, and A-resonance scenario and show that all such solutions are consistent with existing experimental collider constraints, Planck2018 dark matter relic density bounds as well as direct and indirect bounds on neutralino-nucleons scattering cross sections. We show that in sbottom-neutralino co-annihilation scenario, the sbottom mass is about 2 TeV whereas in the case of gluino-neutralino, stop-neutralino, the gluino mass can be between 1 TeV to 3 TeV and stop mass in the range of 1 TeV to 3.5 TeV. {Moreover, in the case of co-annihilation scenario, the stau and chargino masses can be as heavy as 3.5 TeV,} while the A-resonance solutions are in the range of 0.5 TeV to 3.5 TeV. We anticipate that some part of the parameter space will be accessible in the supersymmetry searches at LHC Run-3 and beyond.