Meson-Meson molecules and compact four-quark states
classification
✦ hep-ph
keywords
charmfour-quarkbecomebestbeyondcompactcomponentsconfigurations
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The physics of charm has become one of the best laboratories exposing the limitations of the naive constituent quark model and also giving hints into a more mature description of meson spectroscopy, beyond the simple quark--antiquark configurations. In this talk we review some recent studies of multiquark components in the charm sector and discuss in particular exotic and non-exotic four-quark systems.
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