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The differential cross section and some polarization observables have beencalculated for the $e^+\,e^-\to \gamma\,\gamma$ reaction taking into accountthe contribution of the heavy excited electron and the general form$e\,e\,\gamma\,\gamma$ contact interaction. The spin correlation coefficientsare calculated for the case when both beams have arbitrary polarization. The socalled left-right asymmetry is estimated if only one beam is polarized.Numerical estimations are given for the excited electron contribution to thedifferential cross section and spin correlation coefficients for various valuesof the electron beam energy and excited electron mass.

Effects of excited electron and contact $ee\gamma\gamma $ interaction in $ e^+e^-\rightarrow \gamma\gamma $ reaction