Author/Authors :
OPAL Collaboration، نويسنده , , G Alexander، نويسنده , , J Allison، نويسنده , , N. Altekamp، نويسنده , , K. Ametewee، نويسنده , , K.J Andrson، نويسنده , , S Anderson، نويسنده , , S Arcelli، نويسنده , , S Asai، نويسنده , , D Axen، نويسنده , , G Azuelos، نويسنده , , A.H. Ball، نويسنده , , E Barberio، نويسنده , , R.J. Barlow، نويسنده , , R. Bartoldus، نويسنده , , J.R. Batley، نويسنده , , G Beaudoin، نويسنده , , J Bechtluft، نويسنده , , C Beeston، نويسنده , , T Behnke، نويسنده , , et al.، نويسنده ,
Abstract :
Production of events with multihadronic and leptonic final states has been measured in e+e− collisions at centre-of-mass energies significantly above the Z0 mass, using the OPAL detector at LEP. A substantial production rate of radiative Z0γ events was observed, as expected, together with events with less energetic initial-state photons. The cross-sections and leptonic forward-backward asymmetries were measured and compared with Standard Model expectations. In a model-independent fit to the Z0 lineshape, the hadronic cross-section and lepton asymmetries presented here provide constraints on the size of the γZ0-interference term which are complementary to those afforded by LEP data accumulated at the Z0 resonance.
