Study of acollinear muon pair production ine+e−interactions atEc.m.=29GeV

We have studied the production of acollinear muon pairs in $e^{+}{e}^{-}$ interactions using the MAC detector at PEP. The results are totally accounted for by the QED processes $e^{+}{e}^{-}\to e^{+}{e}^{-}{\mu }^{+}{\mu }^{-}$ and $e^{+}{e}^{-}\to {\mu }^{+}{\mu }^{-}\gamma$ in which only the muon pairs are detected. We have also searched for the production of the supersymmetric partners of the muon. The existence of a spin-0 supersymmetric partner of the muon with a mass ${\mathit{c}}^2$ is excluded at the 95% confidence level.