We have studied single photon production in e+ e- annihilation based on a data sample corresponding to an integrated luminosity of 164.1 pb-1 at s=58 GeV. The single photon yield is consistent with the prediction of the standard model with three light neutrino species. No anomalous signal has been observed. From this result left- and right-handed scalar electrons in the mass degenerate case are excluded at 90% CL below 44.4 GeV/c2 for the massless photino.
All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics