Limits on Strength of Neutral Currents from e+e- ---> mu+mu-
T. Himel · OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information) · 2020
The reaction e+e-+ u+p-has been measured in the center-ofmass energy range 5.8 -7.4 GeV.The polar angle asymmetry agrees with second order QED.ga From this a 95% confidence limit of ME> 53 -e--(GeV) is placed on the mass to coupling constant ratio for a neutral vector boson.