A heavier gluino from t-b-tau Yukawa-unified SUSY

Details A heavier gluino from t-b-tau Yukawa-unified SUSY A heavier gluino from t-b-tau Yukawa-unified SUSY

2012-01-26

arxiv.org/abs/1201.5668v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

Scientific paper

Supersymmetric models with t-b-tau Yukawa coupling unification and unified gaugino masses at the GUT scale with mu >0 show a mild preference for light gluino masses \lesssim 500 GeV. This range of gluino mass is now essentially ruled out by LHC searches. We show that a heavier gluino mass ~ 0.5-3 TeV can also be compatible with excellent t-b-tau Yukawa coupling unification in supersymmetric models with non-universal Higgs masses (NUHM2). The gluino in such models is the lightest colored sparticle, while the squark sector displays an inverted mass hierarchy with m_{\tilde q} ~ 5-20 TeV. We present some LHC testable benchmark points for which the lightest Higgs boson mass ~ 125 GeV. We also discuss LHC signatures of Yukawa-unified models with heavier gluinos. We expect gluino pair production followed by decay to final states containing four b-jets plus four W-bosons plus missing E_T to occur at possibly observable rates at LHC.

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