Measurement of Hadron and Lepton-Pair Production at 130GeV < \sqrt{s} < 189 GeV at LEP

TL;DR

This paper reports measurements of hadron and lepton-pair production in electron-positron collisions at energies between 130 and 189 GeV, confirming Standard Model predictions with high precision.

Contribution

First detailed measurements of hadron and lepton-pair production cross sections at these energies at LEP, validating Standard Model predictions.

Findings

Results agree with Standard Model within uncertainties

Measured cross sections and asymmetries are consistent with theoretical predictions

Data set includes over 34,000 events for analysis

Abstract

We report on measurements of e+e- annihilation into hadrons and lepton pairs. The data have been collected with the L3 detector at LEP at centre-of-mass energies between 130 and 189 GeV. Using a total integrated luminosity of 243.7 pb^-1, 25864 hadronic and 8573 lepton-pair events are selected for the measurement of cross sections and leptonic forward-backward asymmetries. The results are in good agreement with Standard Model predictions.