Measurement of the Running of the Electromagnetic Coupling at LEP

Details Measurement of the Running of the Electromagnetic Coupling at LEP Measurement of the Running of the Electromagnetic Coupling at LEP

2006-01-30

arxiv.org/abs/hep-ex/0601045v1

Physics

High Energy Physics

High Energy Physics - Experiment

To appear in the Proceedings of the International Europhysics Conference on High Energy Physics, July 21st - 27th 2005, Lisboa

Scientific paper

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 1.8GeV^2<-Q^2<6.1GeV^2 and 1800GeV^2 <-Q^2 <21600GeV^2, 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.

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