A Separate SU(2) for the Third Family: Topflavor
David J. Muller, Satya Nandi
Abstract
We consider the extended electroweak gauge group SU(2)1 × SU(2)2 × U(1)Y where the first and second families of fermions couple to SU(2)1 while the third family couples to SU(2)2. Bounds based an precision electroweak observables and heavy gauge boson searches are placed on the new parameters of the theory. The extra gauge bosons can be as light as about a TeV and can be discovered at future colliders such as the NLC and LHC for a wide range of the parameter space. FCNC interactions are also considered.
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