Publication: Nature of the f_0(600) scalar meson from its N_c dependence at two loops in unitarized chiral perturbation theory
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2006-12-15
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American Physical Society
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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 q̅ dependence on the number of colors that, in contrast, is obeyed by the lightest vectors. The method suggests that a subdominant q q̅ component of the f_0(600) possibly originates around 1 GeV.
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©2006 The American Physical Society.
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