Structure of the Light Scalar Mesons from a Coupled Channel Analysis of the s-wave pi pi - k kbar Scattering

Details Structure of the Light Scalar Mesons from a Coupled Channel Analysis of the s-wave pi pi - k kbar Scattering Structure of the Light Scalar Mesons from a Coupled Channel Analysis of the s-wave pi pi - k kbar Scattering

1999-06-04

arxiv.org/abs/hep-ph/9906249v1

FrascatiPhys.Ser.15:229-236,1999

Physics

High Energy Physics

High Energy Physics - Phenomenology

8 pages, 6 PostScript figures, Contribution to the Workshop on Hadron Spectroscopy, Frascati, March 8-12, 1999

Scientific paper

The analysis of the poles of the $\pi\pi$ scattering amplitude is shown to favour a dynamical origin of the sigma meson: it is created by a strongly attractive $\pi\pi$ interaction in the $J^{PC}=0^{++}I=0$ channel. In the limit $N_c\to\infty$, the $\sigma$ meson disappears, contrary to the case of conventional $q\bar{q}$ states. Implications for the search of the scalar $q\bar{q}$ and glueball states are discussed.

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