The process of quark-antiquark pair production Ьу а massive photon in constant chromomagnetic fields that model the gluon condensate field has been considered. Pair production thresholds have been revealed and the pair production rate as а function of the field condensate strength has been calculated. The contribution of the gluon condensate to the cross section of the quark pair production in the case of comparatively weak fields at large energies of the $e^+e^-$ pair has been estimated. The nonanalytical dependence of the cross section on the condensate field, which reveals itself near the quark pair production thresholds, has been demonstrated.
Department of Theoretical Physics
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