Search for Anomalous ZZgamma and Zgammagamma couplings in the process e+e- -> Zgamma at LEP

TL;DR

This paper investigates potential deviations in the ZZgamma and Zgammagamma interactions at LEP energies, setting limits on new physics through analysis of e+e- -> Zgamma data.

Contribution

It provides the first experimental limits on anomalous ZZgamma and Zgammagamma couplings at LEP energies, constraining new physics models.

Findings

No evidence of anomalous couplings was observed.

Limits on the strength of anomalous couplings were established.

Constraints on new physics scales were derived.

Abstract

We search for anomalous trilinear gauge couplings in the ZZgamma and Zgammagamma vertices using data collected with the L3 detector at LEP at a centre-of-mass energy \sqrt{s}=189 GeV. No evidence is found and limits on these couplings and on new physics scales are derived from the analysis of the process e+e- -> Zgamma.