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We study the discovered Ds(2317) at BABAR, CLEO and BELLE, and find that itbelongs to a class of strange multiquarks, which is equivalent to the class ofkaonic molecules bound by hard core attraction. In this class of hadrons a kaonis trapped by a s-wave meson or baryon. To describe this class of multiquarkswe apply the Resonating Group Method, and extract the hard corekaon-meson(baryon)interactions. We derive a criterion to classify theattractive channels. We find that the mesons f0(980), Ds(2457), Bs scalar andaxial, and also the baryons with the quantum numbers of Lambda, Xi_c, Xi_b andalso Omega_cc, Omega_cb and Omega_bb belong to the new hadronic class of theDs(2317).Comment: 5 pages, 1 figure, 2 tables, contribution to the X International  Conference on Hadron Spectroscopy, HADRON 2003, August 31 - September 6,  2003, Aschaffenburg, German

Hard core attraction in hadron scattering and the family of the Ds meson molecule