Two- and three-body structure of the Y(4660)
High Energy Physics - Phenomenology
2012-08-16 v2 Nuclear Theory
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).
Cite
@article{arxiv.1007.1126,
title = {Two- and three-body structure of the Y(4660)},
author = {P. Hagen and H. -W. Hammer and C. Hanhart},
journal= {arXiv preprint arXiv:1007.1126},
year = {2012}
}
Comments
15 pages, 7 figures, final version, presentation improved