%0 Journal Article
%T On the proliferation of X's, Y's and Z's candidates
%A A. Valcarce
%A T. F. Caram¨¦s
%A J. Vijande
%J Physics
%D 2012
%I arXiv
%R 10.1007/s00601-012-0518-8
%X 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.
%U http://arxiv.org/abs/1212.1373v1