Anomalous couplings at LEP2

TL;DR

This paper reports on LEP2's measurements of gauge boson couplings, providing constraints on anomalous interactions and confirming consistency with the Standard Model across multiple processes.

Contribution

It presents new experimental limits on charged, quartic, and neutral anomalous gauge couplings using LEP2 data, expanding the understanding of gauge interactions beyond previous measurements.

Findings

Results are consistent with the Standard Model.

Constraints on anomalous couplings are established.

First measurements of certain four-fermion processes at LEP2.

Abstract

In its second phase, LEP has allowed to study four fermion processes never observed before. Results are presented on the charged triple gauge boson couplings (TGC) from the W-pair, Single W and Single gamma production. The anomalous quartic gauge couplings (QGC) are constrained using production of WWgamma, nunubargammagamma and Zgammagamma final states. Finally, limits on the neutral anomalous gauge couplings (NGC) using the Zgamma and ZZ production processes are also reported. All results are consistent with the Standard Model expectations.