A Model of Strong Flavor Dynamics for the Top Quark

Abstract

We discuss a model in which the third generation fermions undergo a different $SU(2)$ weak interaction from the first two generation fermions. In general, a flavor changing neutral current interaction is expected. Constrained by the precision low energy data, the mass ($M_{Z^{\prime }}=M_{W^{\prime }}$) of the heavy gauge bosons is bounded from below to be about $1.1$ TeV for ${\alpha }_s=0.125$ and about $1.3$ TeV for ${\alpha }_s=0.115$, at the $3\sigma$ level. This model favors a larger $R_b$ and a smaller $R_c$ as compared with the Standard Model, but it does not explain the $R_c$ data. If one takes the $R_b$ data seriously, then $M_{Z^{\prime }}$ is bounded, at the $3\sigma$ level, to be $462$ GeV $<M_{Z^{\prime }}\cos \varphi <1481\mathrm{GeV}$, where $\cos \varphi$ is the mixing angle between the two $SU(2)$'s in the model. Effects predicted for high energy experiments at the Tevatron, LEP140, LEP-II, LHC, and future linear colliders are also discussed.

12 pages LaTeX; 2 figures included as separate files in postscript format

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• W and Z Boson Production in PbarP Collisions at Sqrt(s)=1.8 TeV
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