Generalized Weinberg's approach to the a0/f0 case

Details Generalized Weinberg's approach to the a0/f0 case Generalized Weinberg's approach to the a0/f0 case

2003-11-24

arxiv.org/abs/hep-ph/0311302v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

LaTeX2e, 5 pages, 2 figures, to appear in the proceedings of the HADRON03 conference, Aschaffenburg, Germany. September 2003,

Scientific paper

10.1063/1.1799724

The problem of whether it is possible to distinguish composite from elementary particles is studied in the framework of Weinberg's approach. The possibility to extend this approach to the case of unstable particles in the presence of inelastic channels is considered. The interplay between the low-energy scattering data and the admixture of a bare state in the resonance is discussed, and the implications for the a0(980)/f0(980) case are outlined.

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