Measurement of the Running of the Electromagnetic Coupling at
LEP
Salvatore Mele (Naples, Italy)
The study of low-angle and large-angle Bhabha scattering at LEP gives
access to the running of the electromagnetic coupling. Two recent
measurements of the OPAL and L3 collaborations probe the running of
alpha
in the regions 1.8GeV2<-Q2<6.1GeV2 and 1800GeV2 <-Q2 <21600GeV2,
respectively. The strategies and the results of these studies are
presented. A global overview is given of the agreement of these and
previous L3 findings with the QED predictions.