t-b-tau Yukawa unification for mu < 0 with a sub-TeV sparticle spectrum

TL;DR

This paper demonstrates that t-b-tau Yukawa unification in a specific supersymmetric model with mu < 0 is compatible with experimental constraints, and identifies testable sparticle spectra for collider and detection experiments.

Contribution

It shows compatibility of Yukawa unification with experimental data in a non-universal gaugino mass model with mu < 0, and provides benchmark points for future testing.

Findings

Relic neutralino abundance satisfies WMAP bounds.

Muon g-2 is in agreement with observations.

Benchmark sparticle spectra are testable at the LHC.

Abstract

We show compatibility with all known experimental constraints of t-b-tau Yukawa coupling unification in supersymmetric SU(4)_c x SU(2)_L x SU(2)_R which has non-universal gaugino masses and the MSSM parameter mu < 0. In particular, the relic neutralino abundance satisfies the WMAP bounds and Delta (g-2)_mu is in good agreement with the observations. We identify benchmark points for the sparticle spectra which can be tested at the LHC, including those associated with gluino and stau coannihilation channels, mixed bino-Higgsino state and the A-funnel region. We also briefly discuss prospects for testing Yukawa unification with the ongoing and planned direct detection experiments.