Measurements of electroweak couplings of the tau lepton at L3

TL;DR

This paper reviews measurements of tau lepton electroweak couplings using L3 data near the Z resonance, providing insights into the tau's interactions with W, Z, and photon gauge bosons.

Contribution

It presents the most comprehensive measurements of tau electroweak couplings, including vector, axial-vector, and anomalous couplings, based on the full L3 dataset.

Findings

Measured effective vector and axial-vector couplings of tau.

Determined the Lorentz structure of the weak charged current.

Set limits on anomalous electroweak couplings of tau.

Abstract

We review the current knowledge of the couplings of the tau lepton to the electroweak gauge bosons, the W, Z and photon, obtained from the full L3 data sample at center-of-mass energies near the Z mass. Measurements of the the effective vector and axial-vector weak neutral couplings of the $\tau$, the Lorentz structure of the weak charged current, and anomalous couplings of the electroweak gauge bosons to the tau are presented.