Radiative Corrections toe+e−→μ+μ−and Neutral Currents in Unified Gauge Theories

Expressions are given for the part of the radiative corrections to the process $e^{+}{e}^{-}\to {\mu }^{+}{\mu }^{-}$ which are asymmetric in the cosine of the scattering angle. These corrections are compared with the correction due to the exchange of a neutral vector meson expected in some gauge theories. Given these results it is easy to determine what result should be expected from a measurement of $d\sigma \left(\theta \right)-d\sigma (\pi -\theta )$ if the gauge theories are correct (or incorrect). This result will be independent of any unknown parameters of the gauge theory. The effects of the neutral vector meson on the reaction $e^{+}{e}^{-}\to e^{+}{e}^{-}$ are also given.