The potentialities of the production of the scalar KK molecules in the φ radiative decays are considered beyond the narrow resonance width ap-The mass spectra in the ππ , πη , K + K − , K 0K 0 channels are calculated. The imaginary part of the amplitude φ → γf 0 (a 0 ) is calculated analytically. It is obtained the phase of the scalar resonance production amplitude that causes the interference patterns in the reaction e + e − → γπ + π − in the φ meson mass region.12.39.-x, 13.40.Hq.

We describe the interference between amplitudes e ϩ e Ϫ →→␥ ϩ Ϫ and e ϩ e Ϫ →→␥ f 0 →␥ ϩ Ϫ , where the f 0 meson is considered in the framework of the four-quark model and the model of the scalar KK molecule. The general expressions for the differential cross section with the radiative corrections and two angle cuts are given. The interference patterns are obtained in the spectrum of the differential cross section by the energy of the photon and in the full cross section by the energy of the beams. ͓S0556-2821͑97͒01803-1͔

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