Exploring the Yukawa Unified Minimal Supergravity Model at the Tevatron, LEP-II, and the LHC

Abstract

We explore the prospects for detection of sparticles and Higgs bosons at the Tevatron, LEP-200 and the LHC in the allowed parameter space of a `yukawa unified' (${\lambda }_b(M_U)={\lambda }_{\tau }(M_U)$) minimal supergravity (YUMS) model, where the only non-zero unification scale soft-SUSY-breaking terms are a universal gaugino mass and a Higgs mixing term. In a bottom-up approach, just two weak scale parameters, $\text{tanb}$ and $\text{mha}$, (along with the sign of the Higgs mixing parameter $\mu$) completely parameterize the model. Many interesting `special' situations regarding sparticle and Higgs discovery arise, such as the importance of the invisible $\text{hl}\text{rta}\text{cnone}\text{cnone},\text{snu}\text{snubar}$ decay modes.

Comments: 12 pages, requires phyzzx.tex, full postscript file including embedded figures available via anonymous ftp at ucdhep.ucdavis.edu as [anonymous.gunion]noscale.ps, preprint UCD-94-1