A Vector-like Extension of the Standard Model

Details A Vector-like Extension of the Standard Model A Vector-like Extension of the Standard Model

1994-11-10

arxiv.org/abs/hep-ph/9411258v1

Prog.Theor.Phys. 92 (1994) 1149-1160

Physics

High Energy Physics

High Energy Physics - Phenomenology

25p , latex, UT-687

Scientific paper

10.1143/PTP.92.1149

A vector-like extension of the standard model for heavier quarks and leptons with $SU(2)\times U(1)$ gauge symmetry and only one Higgs doublet is examined. This scheme incorporates infinitely many fermions and avoids the appearance of a strongly interacting sector. The model is perturbatively well controllable, and constraints such as $b\rightarrow s\gamma$ and GIM suppression in general are naturally satisfied if the on-set of heavier fermion mass scale is chosen at a few TeV. In this scheme, the physical Higgs particle generally mediates leptonic as well as quark flavor-changing processes at a rate below the present experimental limit. Vector-like models, if suitably defined, provide a viable and interesting scheme for physics beyond 1 TeV.

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