Manifestation Of An Excited Electron In E(+)E(-) -> Gamma Gamma Reaction

The differential cross section and some polarization observables have been calculated for the e(+)e(-) -> gamma gamma reaction taking into account the contribution of the excited electron. The spin correlation coefficients were calculated for the case when both beams are polarized. We consider two approaches for the excited electron contribution: the ee gamma gamma contact interaction and the exchange of the excited electron in t- and u-channels. Numerical estimations are given for the excited electron contribution to the differential cross section and spin correlation coefficients for various values of the electron beam energy and excited electron mass.