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

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

2006-10-30

arxiv.org/abs/hep-ph/0610397v1

Phys.Rev.Lett.97:242002,2006

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, 1 Figure. To appear in Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.97.242002

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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