Journal article
A study of the reaction e+e−→γγ at LEP
Abstract
The pure QED reaction e+e−→γγ has been studied at centre of mass energies around the mass of the Z0 boson using data recorded by the OPAL detector at LEP. The results are in good agreement with the QED prediction. Lower limits on the cutoff parameters of the modified electron propagator are found to be Λ+>89 GeV and Λ. The lower limit on the mass of an excited electron is 82 GeV assuming the coupling constant λ=1. Upper limits on the branching …
Authors
Collaboration O; Akrawy MZ; Alexander G; Allison J; Allport PP; Anderson KJ; Armitage JC; Arnison GTJ; Ashton P; Azuelos G
Journal
Physics Letters B, Vol. 241, No. 1, pp. 133–140
Publisher
Elsevier
Publication Date
May 1990
DOI
10.1016/0370-2693(90)91500-b
ISSN
0370-2693