Hard-Photon Production and Tests of QED at LEP
arXiv:hep-ex/0002036 · doi:10.1016/S0370-2693(00)00082-4
Abstract
The total and differential cross sections of the process e+e- -> n gamma with n >= 2 are measured using data collected by the L3 experiment at centre-of-mass energies of \sqrt{s}=183 and 189 GeV. The results are in agreement with the Standard Model expectations. Limits are set on deviations from QED, contact interaction cut-off parameters and masses of excited electrons.