Widths of tetraquarks with hidden charm
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The relativistic four-quark equations are found in the framework of coupled-channel formalism. The dynamical mixing of the meson-meson states with the four-quark states is considered. The four-quark amplitudes of the tetraquarks with hidden charm including u, d, s and charmed quarks are constructed. The poles of these amplitudes determine the masses and widths of tetraquarks.
7 pages, the typos corrected in Table II, results unchanged
7 pages, the typos corrected in Table II, results unchanged