Structure of f0(980) from a Coupled Channel Analysis of S-wave pi pi Scattering

Details Structure of f0(980) from a Coupled Channel Analysis of S-wave pi pi Scattering Structure of f0(980) from a Coupled Channel Analysis of S-wave pi pi Scattering

1997-05-05

arxiv.org/abs/hep-ph/9705230v2

Eur.Phys.J.C4:317-326,1998

Physics

High Energy Physics

High Energy Physics - Phenomenology

18 pages, 14 figures, published in Eur. Phys. J. C (online: February 20, 1998). The problem is more fully explored in the upda

Scientific paper

10.1007/s100520050210

A coupled channel model is used to study the nature of the f0(980) resonance. It is shown that the existence of two poles close to KKbar threshold, as found in many data fits and confirmed here, can be reconciled with the KKbar molecular origin of the f0(980). Due to a strong coupling between channels the number of the S-matrix poles close to the physical region in the physical case exceeds the number of bare states introduced in the model.

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