Eur. Phys. J. C (2006) 47: 1-19
https://doi.org/10.1140/epjc/s2006-02539-1

Experimental Physics

Measurement of hadron and lepton-pair production in e⁺e^- collisions at at LEP

Received: 3 October 2005
Revised: 22 February 2006
Published online: 19 May 2006

Abstract

Hadron production and lepton-pair production in e⁺e^- collisions are studied with data collected with the L3 detector at LEP at centre-of-mass energies . Using a total integrated luminosity of 453 pb^-1, 36057 hadronic events and 12863 lepton-pair events are selected. The cross sections for hadron production and lepton-pair production are measured for the full sample and for events where no high-energy initial-state-radiation photon is emitted prior to the collisions. Lepton-pair events are further investigated and forward-backward asymmetries are measured. Finally, the differential cross sections for electron-positron pair-production is determined as a function of the scattering angle. An overall good agreement is found with Standard Model predictions.