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Too many X's, Y's and Z's?

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	Valcarce Mejía, Alfredo; Fernández Caramés, Teresa; Vijande Asenjo, Javier Perfil
	This document is a artículoDate2013
	Este documento está disponible también en : http://dx.doi.org/10.1007/s00601-012-0518-8
	Este documento está disponible también en : http://hdl.handle.net/10550/33041
	Heavy meson spectroscopy above open flavor thresholds has become a challenge both from the experimental and theoretical points of view. Experimentally, several signals have been interpreted as meson resonances with unusual properties; theoretically, such signals may be identified with meson-meson molecules or compact multiquark structures. We analyze the influence of thresholds on heavy meson spectroscopy comparing different flavor sectors and quantum numbers. The validity of a quark-model picture above open-flavor thresholds would severely restrict the number of channels that may lodge multiquark structures as meson-meson molecules.
	Valcarce Mejía, Alfredo Caramés, T.F. Vijande Asenjo, Javier 2013 Too many X's, Y's and Z's? Few-Body Systems
	http://dx.doi.org/10.1007/s00601-012-0518-8