A predictive Yukawa unified SO(10) model: Higgs and sparticle masses

Abstract

We revisit a class of supersymmetric SO(10) models with t-b-τ Yukawa coupling unification condition, with emphasis on the prediction of the Higgs mass. We discuss qualitative features in this model that lead to a Higgs mass prediction close to 125 GeV. We show this with two distinct computing packages, Isajet and SuSpect, and also show that they yield similar global features in the parameter space of this model. We find that t-b-τ Yukawa coupling unification prefers values of the CP-odd Higgs mass m A to be around 600–800 GeV, with all colored sparticle masses above 3 TeV. We also briefly discuss prospects for testing this scenario with the ongoing and planned direct dark matter detection experiments. In this class of models with t-b-τ Yukawa unification, the neutralino dark matter particle is heavy ( $ {m_{{\widetilde{\chi}_1^0}}} $ ≳ 400 GeV), which coannihilates with a stau to yield 1 the correct relic abundance.