Low-energy Universality and the New Charmonium Resonance at 3870 MeV

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dc.creatorBraaten, Eric
dc.creatorKusunoki, Masaoki
dc.date2003-11-11
dc.date.accessioned2026-07-07T10:29:01Z
dc.date.available2026-07-07T10:29:01Z
dc.descriptionThe recently-discovered narrow charmonium resonance near 3870 MeV is interpreted as a hadronic molecule whose constituents are the charm mesons D^0 and \bar D^{*0} or \bar D^0 and D^{*0}. Because of an accidental fine-tuning of the molecule to very near the D^0 \bar D^{*0} threshold, it has some universal properties that are completely determined by the unnaturally large D^0 \bar D^{*0} scattering length a. Its narrow width can be explained by the suppression by a factor of 1/a of decay modes other than the decay of a constituent \bar D^{*0} or D^{*0}. Its production rates are also suppressed by a factor of 1/a. A particularly predictive mechanism for generating the large scattering length is the accidental fine-tuning of a P-wave charmonium state to the D^0 \bar D^{*0} threshold.
dc.description13 pages, revtex4
dc.identifierhttps://arxiv.org/abs/hep-ph/0311147
dc.identifierhttp://arxiv.org/abs/hep-ph/0311147
dc.identifierPhys.Rev.D69:074005,2004
dc.identifierdoi:10.1103/PhysRevD.69.074005
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/177650
dc.subjectHigh Energy Physics - Phenomenology
dc.titleLow-energy Universality and the New Charmonium Resonance at 3870 MeV
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