Top-bottom-tau Yukawa coupling unification in the MSSM+1VF and fermion masses as IR fixed points

Abstract

In the MSSM extended by a complete vectorlike family, precise top, bottom and tau Yukawa coupling unification can be achieved assuming SUSY threshold corrections which are typical for comparable superpartner masses. Furthermore, the unification is possible with a large unified coupling, implying that all three fermion masses can be simultaneously close to their IR fixed points. Assuming unified Yukawa couplings of order one or larger, the preferred common scale of new physics (superpartners and vectorlike matter) is in the 3 TeV to 30 TeV range, with larger couplings favoring smaller scales. Splitting superpartner masses from masses of vectorlike fields, the preferred scales extend in both directions. The multi-TeV scale for superpartners is compatible with and independently suggested by the Higgs boson mass.

v2: matches published version

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Cited by in corpus (12)

• Muon $g-2$ in two Higgs doublet models with vectorlike leptons
• Signals with six bottom quarks for charged and neutral Higgs bosons
• Tau-jet signatures of vectorlike quark decays to heavy charged and neutral Higgs bosons
• Current status on pair-produced muon-philic vectorlike leptons in multilepton channels at the LHC
• Cascade decays of Heavy Higgs bosons through vectorlike quarks
• Leptonic cascade decays of a heavy Higgs boson through vectorlike leptons at the LHC
• Seven largest couplings of the standard model as IR fixed points
• The Two Scales of New Physics in Higgs Couplings
• Muon g-2 and other observables in models with extended Higgs and matter sectors
• Yukawa Unification with light supersymmetric particles consistent with LHC constraints
• Comparatively Light Extra Higgs States as Signature of SUSY $\mathrm{SO}(10)$ GUTs with 3rd Family Yukawa Unification
• Charged and neutral Higgs bosons in final states with six bottom quarks