CMSSM with Yukawa Quasi-Unification Revisited

TL;DR

This paper revisits the CMSSM with Yukawa quasi-unification, updating constraints from cosmology and particle physics, and finds a limited parameter space with potential for future dark matter detection.

Contribution

It provides a comprehensive reinvestigation of the CMSSM with Yukawa quasi-unification under current experimental constraints, identifying viable parameter regions.

Findings

Allowed neutralino mass range: 341-677 GeV

Higgs mass prediction: 117-122.2 GeV

Potential detectability in future dark matter searches

Abstract

The constrained minimal supersymmetric standard model with mu>0 supplemented by an `asymptotic' Yukawa coupling quasi-unification condition, which allows an acceptable b-quark mass, is reinvestigated. Imposing updated constraints from the cold dark matter abundance in the universe, B physics, the muon anomalous magnetic moment, and the mass mh of the lightest neutral CP-even Higgs boson, we find that the allowed parameter space is quite limited but not unnaturally small with the cold dark matter abundance suppressed only via neutralino-stau coannihilations. The lightest neutralino with mass in the range (341-677) GeV is possibly detectable in the future direct cold dark matter searches via its spin-independent cross section with nucleon. In the allowed parameter space of the model, we obtain mh=(117-122.2) GeV.