Compositeness at TeV energy scale

We assumed that the breaking of SU(2)L x U(1)Y gauge symmetry is caused by some new strong gauge interaction. We used the non-linear σ model to describe the Higgs sector and introduced the composite bosons following the idea of the hidden local symmetry. We calculated the deviations from the standard model and got some constraints on them from the new experimental data with the high precisions. From the gauge boson mass ratio, we obtained the upper bound for g/g'' but, we cannot derive any further constraints from the observables at Z peak. At √s ≅ 600 Gev, the V and A resonances could give rise to sensible deviations. But a similar deviation could result from the anomalous moments k and λ for WWZ and WWγ and the excited boson in composite model. So it is difficult to discriminate between the different possibility using only W pair production. (author)