Production of two hard isolated photons in $e^{+}{e}^{-}\to {\mu }^{+}{\mu }^{-}\gamma \gamma$ at LEP

K. Kołodziej, F. Jegerlehner, G. J. van Oldenborgh

A calculation of the hard bremsstrahlung process e+ e- -> mu+ mu- gamma gamma is presented and compared with recent results from the L3 Collaboration.