Contributions of weak interactions to the process\(e^ + e^ - \to \bar v_\tau X^ + v_\tau X^ - \)

We calculate the differential cross section for the processe+e− →γ for longitudinal or transversal polarization of the electron positron beams. The resulting formulae are evaluated using Monte Carlo methods to find measurable effects of the weak interaction, in particular those exhibiting parity violation.