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Axial resonances in the open and hidden charm sectors

AuthorsGamermann, Daniel ; Oset, Eulogi
KeywordsMeson resonances
Heavy mesons
[PACS] Bound and unstable states; Bethe-Salpeter equations
[PACS] Multichannel scattering
[PACS] Heavy quark effective theory
[PACS] Chiral Lagrangians
Issue Date30-Aug-2007
CitationEuropean Physical Journal A 33(2): 119-131 (2007)
AbstractA SU(4) flavor symmetrical Lagrangian is constructed for the interaction of the pseudo-scalar mesons with the vector mesons. SU(4) symmetry is broken to SU(3) by suppression of terms in the Lagrangian where the interaction should be driven by charmed mesons. Chiral symmetry can be restored by setting this new SU(4) symmetry-breaking parameters to zero. Unitarization in coupled channels leads to the dynamical generation of resonances. Many known axial resonances can be identified including the new controversial X(3872) and the structure found recently by Belle around 3875 MeV in the hidden charm sector. Also new resonances are predicted, some of them with exotic quantum numbers.
Description13 pages, 2 figures.-- PACS nrs.: 11.10.St, 11.80.Gw, 12.39.Hg, 12.39.Fe.-- ISI Article Identifier: 000249271600001.-- ArXiv pre-print available at: http://arxiv.org/abs/0704.2314
Publisher version (URL)http://dx.doi.org/10.1140/epja/i2007-10435-1
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