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Charmonium's K2 peak | | Felipe J. Llanes-Estrada
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4 Jul 2005 | | Journal: | Phys.Rev. D72 (2005) 031503 | | Subject: | hep-ph | | Affiliation: | Complutense | | Abstract: | The newly reported Y(4260) becomes the second most massive state in the charmonium family. We argue that it displaces the psi(4415) as the (largely) 4s vector charmonium state, recall s-d wave interference to explain the lack of a signal in e-e+ to hadrons and suggest some further study avenues that can exclude exotic meson assignments. The absence of a J/psi KK mode can be understood, beyond phase space suppression, to be a consequence of chiral symmetry. We also provide a model calculation in this sector showing that, although forcing the fit somewhat (which suggests a small sea quark wavefunction component), the state can be incorporated in a standard scheme. | | Source: | arXiv, hep-ph/0507035 | | Services: | Forum | Review | PDF | Favorites | |
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