Remarks on the f_0(400-1200) scalar meson as the dynamically generated chiral partner of the pion

Details Remarks on the f_0(400-1200) scalar meson as the dynamically generated chiral partner of the pion Remarks on the f_0(400-1200) scalar meson as the dynamically generated chiral partner of the pion

2002-04-12

arxiv.org/abs/hep-ph/0204139v1

Mod.Phys.Lett.A17:1673,2002

Physics

High Energy Physics

High Energy Physics - Phenomenology

15 pages, plain LaTeX, 3 EPS figures

Scientific paper

10.1142/S0217732302007326

The quark-level linear sigma model is revisited, in particular concerning the identification of the f_0(400-1200) (or \sigma(600)) scalar meson as the chiral partner of the pion. We demonstrate the predictive power of the linear sigma model through the pi-pi and pi-N s-wave scattering lengths, as well as several electromagnetic, weak, and strong decays of pseudoscalar and vector mesons. The ease with which the data for these observables are reproduced in the linear sigma model lends credit to the necessity to include the sigma as a fundamental q\bar{q} degree of freedom, to be contrasted with approaches like chiral perturbation theory or the confining NJL model of Shakin and Wang.

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