Effective Operators and Extended Symmetry

Abstract

In this note we expand on our previous study of the implications of LEP1 results for future colliders. We extend the effective operator-based analysis of De Rújula et al. to a larger symmetry group, and show at which cost their expectations can be relaxed. Of particular interest to experiment is a rephrasing of our previous results in terms of the Renard et al. parametrization for the gauge boson self-couplings (slightly extended to include $\delta g_{\gamma }$). We suggest the use of a ($\delta g_{\gamma }$, $\delta g_Z$) plot to confront the expectations of various models.

Comments: 17p+figs(available upon request), CERN-TH 6925, IEM-FT-74/93