ee$\in$MC: Comments on Asymmetries in QED

In the Quantum Electrodynamics process $e^{+}{e}^{-}\to l^{+}{l}^{-}(n\gamma )$, there are two well known angular asymmetries in the $cos(\theta )$ and the $cos({\theta }^{\ast })$ distributions. In this paper, the QED angular asymmetry related to the $cos({\theta }^{\ast })$ distribution is investigated in terms of the Dirac propagator and the associated boundary conditions from which the Dirac propagator is constructed and the potential implications are examined.