Four Generations, Higgs Physics, and the MSSM

Abstract

We consider the effects of a fourth generation of chiral fermions within the MSSM. Such a model offers the possibility of having the lightest neutral Higgs boson significantly heavier than in the three generation MSSM. The model is highly constrained by precision electroweak data, along with Higgs searches at the Tevatron. In addition, the requirements of perturbative unitarity and direct searches for heavy quarks imply that the four generation MSSM is only consistent for tan beta ~ 1 and highly tuned 4th generation fermion masses.

References added and minor typographical errors corrected

References in corpus (6)

• Precision Constraints on Extra Fermion Generations
• Four Generations, the Electroweak Phase Transition, and Supersymmetry
• Experimental constraints on fourth generation quark masses
• Perturbativity and a Fourth Generation in the MSSM
• Higgs Masses in the Four Generation MSSM
• The Fourth Generation t-prime in Extensions of the Standard Model

Cited by in corpus (5)

• An A_5 Model of Four Lepton Generations
• The Supersymmetric Leptophilic Higgs Model
• Large mass splittings for fourth generation fermions allowed by LHC Higgs exclusion
• SUSY signals with small and large trilinear couplings at the LHC 7 TeV runs and neutralino dark matter
• Realistic Four-Generation MSSM in Type II String Theory