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2012

Meson spectroscopy: too much excitement and too few excitations

Rupp, George, Coito, Susana, van Beveren, Eef

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We briefly review the general status of meson spectroscopy, especially in light of the often made claim that there are too many observed resonances to be accounted for as $q\bar{q}$ states.

Also, the adequacy of the usual Coulomb-plus-linear, alias "funnel", confining potential for reproducing the experimental spectra of light, heavy-light, and heavy mesons is critically analysed.
Thus, many serious discrepancies are observed and discussed.
As possible causes, we suggest the neglect of unitarisation and other coupled-channel effects, as well as the deficiency of the funnel potential itself.

Meson spectroscopy: too much excitement and too few excitations · Around

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E. van Beveren, G. Rupp, arXiv:1204.1984
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