Looking for weak-boson compositeness via form factors

We examine the possibility that the composite structure of weak gauge bosons may first reveal itself through form-factor-like effects. We consider modifying the propagators and gauge-boson self-couplings with a simple parametrization of these composite-structure form factors, and examine a large number of processes where deviations from the standard model may be observed. Present data indicate the W, Z composite scale Λ≳0.1 TeV but future data from CERN LEP II may push Λ>1 TeV. We find the process most sensitive to these form factors resulting from compositeness to be the reaction $e^{+}$ $e^{\mathrm{-}}$→$W^{+}$ $W^{\mathrm{-}}$ because of the unique cancellations which take place in gauge theories.