S. Villa

Gauge boson couplings at LEP

A review is given of the measurements of triple and quartic couplings among the electroweak gauge bosons performed at LEP by the four experiments ALEPH, DELPHI, L3 and OPAL. Emphasis is placed on recently published results and on combinations of results performed by the LEP electroweak gauge-couplings group. All measurements presented are consistent with the Standard Model expectations.

Branching ratios of the Z0 and W± into 2 and 3 pions

Abstract We estimate the branching ratios of the weak gauge bosons Z 0 and W ± into two and three pion final states using vector meson dominance. On the basis of the upper bounds obtained, it is unlikely that any of these decay modes for the weak gauge bosons will be observed with present experiments.