Four Generations, the Electroweak Phase Transition, and Supersymmetry

Abstract

We calculate the strength of the electroweak phase transition in a supersymmetric model with four chiral generations. The additional chiral fermions (and scalar partners) lower the critical temperature and thus strengthen the first-order phase transition. The scalar partners stabilize the potential, leading to an effective theory that is bounded from below. We identify the ensemble of parameters where phi_c/T_c \gsim 1 simultaneous with obtaining a large enough Higgs mass. Our calculations focus on a subset of the full four generational supersymmetric parameter space: We take the pseudoscalar heavy, tan(beta)=1, and neglect all subleading contributions to the effective potential. We find that the region of parameter space with a strong first-order phase transition requires m_tilde{q}'/m_q' \lsim 1.1 while the constraint on the lightest Higgs mass requires m_tilde{q}'/m_q' /gsim 1 with m_q' \gsim 300 GeV. We are led to an intriguing prediction of quarks and squarks just beyond the current Tevatron direct search limits that are poised to be discovered quickly at the LHC.

9 pages, 10 PDF figures, REVTeX

References in corpus (32)

• Precision Corrections in the Minimal Supersymmetric Standard Model
• Progress in Electroweak Baryogenesis
• The Effective Potential and First-Order Phase Transitions: Beyond Leading Order
• Singlet Higgs Phenomenology and the Electroweak Phase Transition
• Four Generations and Higgs Physics
• First-Order Electroweak Phase Transition in the Standard Model with a Low Cutoff
• Opening the Window for Electroweak Baryogenesis
• Quarks and Leptons Beyond the Third Generation
• Extra Families, Higgs Spectrum and Oblique Corrections
• Reconciling the Two-Loop Diagrammatic and Effective Field Theory Computations of the Mass of the Lightest CP-even Higgs Boson in the MSSM
• Dynamics of Non-renormalizable Electroweak Symmetry Breaking
• Electroweak Baryogenesis and Dark Matter in the nMSSM
• Electroweak Baryogenesis and Higgs and Stop Searches at LEP and the Tevatron
• A light stop and electroweak baryogenesis
• The Electroweak Phase Transition in a Nonminimal Supersymmetric Model
• Electroweak Phase Transition and Baryogenesis in the nMSSM
• Electroweak Baryogenesis and New TeV Fermions
• On the electroweak phase transition in the Minimal Supersymmetric Standard Model
• What is the Criterion for a Strong First Order Electroweak Phase Transition in Singlet Models?
• Electroweak Baryogenesis in a Supersymmetric U(1)' Model
• Aspects of the electroweak phase transition in the Minimal Supersymmetric Standard Model
• What's new with the electroweak phase transition?
• Phase Transitions in the NMSSM
• Search for Heavy Top-like Quarks t' -> Wq Using Lepton Plus Jets Events in 1.96 TeV Proton-Antiproton Collisions
• Electroweak phase transition in a nonminimal supersymmetric model
• Aspects of Phase Transition in Gauge-Higgs Unification at Finite Temperature
• Baryogenesis from an Earlier Phase Transition
• A Minimal Four-Family Supergravity Model
• Baryogenesis in the MSSM, nMSSM and NMSSM
• Electroweak phase transition in the MSSM with four generations
• Bulk Mass Effects in Gauge-Higgs Unification at Finite Temperature
• Four-Generation Low Energy Supersymmetry with a Light Top Quark

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