Münster 2011 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 58: Hadronenstruktur und -spektroskopie IX
HK 58.8: Vortrag
Donnerstag, 24. März 2011, 18:30–18:45, C-2
Two- and three-body structure of the Y(4660) — •Philipp Hagen1, Hans-Werner Hammer1, and Christoph Hanhart2 — 1Helmholtz-Institut für Strahlen- und Kernphysik and Bethe Center for Theoretical Physics, Universität Bonn — 2Institut für Kernphysik, Institute for Advanced Simulation and Jülich Center for Hadron Physics, Forschungszentrum Jülich
We study general features of three-meson bound states using the Y(4660) as an example. Here the Y(4660) is assumed to be either a two-body bound state of the f0(980), itself a bound state of K and K, and the ψ′=ψ(2s) , or a three-body bound state of ψ′, K, and K. In particular, we investigate in detail the interplay of the various scales inherent in the problem, namely the f0 binding energy, the Y binding energy, and the Kψ′ scattering length. This allows us to understand under which circumstances the substructure of the f0(980) can be neglected in the description of the Y(4660).