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arXiv · 1007.1126

Two- and three-body structure of the Y(4660)

P. Hagen·H. -W. Hammer·C. Hanhart
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Abstract

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 f_0(980), itself a bound state of K and Kbar, and the psi'= psi(2s), or a three-body bound state of psi', K, and Kbar. In particular, we investigate in detail the interplay of the various scales inherent in the problem, namely the f_0 binding energy, the Y binding energy, and the K-psi' scattering length. This allows us to understand under which circumstances the substructure of the f_0(980) can be neglected in the description of the Y(4660).

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P. Hagen, H. -W. Hammer, C. Hanhart. 2010-07-07. Two- and three-body structure of the Y(4660). https://doi.org/10.1016/j.physletb.2010.12.021

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