Semi-perturbative unification with extra vector-like families

Abstract

We make a comprehensive analysis of an extended supersymmetric model(ESSM) obtained by adding a pair of vector-like families to the minimal supersymmetric standard model and having specific forms of 5 x 5 fermion mass matrices. The singlet Higgs couplings which link the ordinary to vector-like generations do not have the renormalization effects of the gauge interactions and hence the "quasi-infrared fixed point" near the scale of the top quark mass. The two-loop Yukawa effects on gauge couplings lead to an unified coupling ${\alpha }_X$ around 0.2 with an unification scale M_X of 10^{16.9} GeV. Large Yukawa effects in the high energy region arrest the growth of the QCD coupling near M_X making the evolution flat. The renormalization effects of the vector-like generations on soft mass parameters has important effects on the charge and color breaking(CCB)minima. We will show that there exists parameter space where there is no charge and color breaking. We will also demonstrate that there exists minima of the Higgs potential which satisfies the mass of the Z boson but avoid CCB. Upper limits on the mass of the lightest Higgs boson from the one-loop effective scalar potential is obtained for sets of universal soft supersymmetry breaking mass parameters.

LaTeX, 38 pages and 7 eps figures. Many revisions included

References in corpus (3)

• Strong Unification
• Charge and Colour Breaking Constraints in the MSSM With Non-Universal SUSY Breaking
• The effect of Yukawa couplings on Unification Predictions and the non-perturbative limit

Cited by in corpus (18)

• Higgs Boson Mass, Sparticle Spectrum and Little Hierarchy Problem in Extended MSSM
• Testable Flipped SU(5) x U(1)_X Models
• Two Higgs doublet model with vectorlike leptons and contributions to $pp\to WW$ and $H\to WW$
• Insensitive Unification of Gauge Couplings
• Unification of Gauge Couplings in the Standard Model with Extra Vector-like Families
• NMSSM extended with vectorlike particles and the diphoton excess at the LHC
• Supersymmetry and Vector-like Extra Generation
• Hunting for Vectorlike Quarks
• Color Triplet Diquarks at the LHC
• New decay modes of heavy Higgs bosons in a two Higgs doublet model with vectorlike leptons
• Flavor anomalies at the LHC and the R-parity violating supersymmetric model extended with vectorlike particles
• Top-bottom-tau Yukawa coupling unification in the MSSM+1VF and fermion masses as IR fixed points
• Mass scale of vectorlike matter and superpartners from IR fixed point predictions of gauge and top Yukawa couplings
• Cascade decays of Heavy Higgs bosons through vectorlike quarks
• Radiative processes (tau -> mu gamma, mu -> e gamma and muon g-2) as probes of ESSM/SO(10)
• Observable n - anti-n Oscillations with New Physics at LHC
• Phenomenological Aspects of R-parity Violating Supersymmetry with A Vector-like Extra Generation
• Unification of Gauge Couplings and the Higgs Mass in Vector-Like Particle Theories Extended into NMSSM