Test of Quantum Electrodynamics ats12=13 and 17GeV

Abstract
We report on the measurement of the reaction e+ee+e with a large—solid-angle electromagnetic shower detector at center-of-mass energies s=13 and 17 GeV. Comparison of our results with predictions of quantum electrodynamics shows excellent agreement in both the angular distribution and energy dependence. Values of cutoff parameters are also given.