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arXiv · hep-ph/0610397

Nature of the f_0(600) from its N_c dependence at two loops in unitarized Chiral Perturbation Theory

J. R. Pelaez·G. Rios
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Abstract

By using unitarized two-loop Chiral Perturbation Theory partial waves to describe pion-pion scattering we find that the dominant component of the lightest scalar meson does not follow the q-qbar dependence on the number of colors that, in contrast, is obeyed by the lightest vectors. The method suggests that a subdominant q-qbar component of the f_0(600) possibly originates around 1 GeV.

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J. R. Pelaez, G. Rios. 2006-10-30. Nature of the f_0(600) from its N_c dependence at two loops in unitarized Chiral Perturbation Theory. https://doi.org/10.1103/physrevlett.97.242002

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