Weak Neutral Currents ine+eCollisions ats=29GeV

Abstract
The differential cross sections for lepton pair production in e+e annihilation at 29 GeV have been measured and found to be in good agreement with the standard model of the electroweak interaction. With the assumption of eμτ universality, the weak neutral-current couplings are determined to be ga2=0.23±0.05 and gv2=0.03±0.04.