We consider a model in which the third family fermions are subjected to an SU(2) interaction different from the first two family fermions. Constrained by the Z-pole data, the heavy gauge boson mass is bounded from below to be about 1.7 TeV at the 2σ level. In this model, the flavor mixing between τ and μ can be so large that Br(τ → μνμντ)/Br(τ → eνeντ) and Br(τ → μμμ) provide a better constraint than the LEP/SLC data in some region of parameter space. Furthermore, flavor-changing neutral currents are unavoidable in the quark sector of the model. Significant effects to the B0-B0 mixing and the rare decays of the K and B mesons, such as K± → π±νν̄, b → sνv̄, Bs → τ+τ-, μ+μ- and Bs,d → μ±μ±, are expected.
ASJC Scopus subject areas
- Nuclear and High Energy Physics
- Astronomy and Astrophysics
- Physics and Astronomy(all)