Hadronic molecular contribution to cryptoexotic meson amplitude

The solutions of four-quark equations using the method of extracting leading singularities of the amplitudes are obtained. The calculations of cryptoexotic meson amplitudes provide the estimates of four-quark amplitude, glueball amplitude and hadronic molecule amplitudes. We find that the main contributions to the cryptoexotic meson amplitude are given by the four-quark state and the glueball. (author)