On the heavy-quark states interactions with nucleons and nuclei
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چکیده
601 The method of multipole expansion in QCD is used to calculate the scattering amplitudes of heavy-quark ( QQ)-states on hadrons. The amplitudes near threshold and the total cross sections for (QQ)hinteractions at different energies are calculated. It is pointed out that these cross sections are small at energies of (QQ)-system E < 50 GeV. This result has serious implications for the models, which explain the ( QQ)-states suppression in heavy ions collisions in terms of (QQ)-interaction with comoving hadrons.
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تاریخ انتشار 2016