Nature of the f_0(600) scalar meson from its N_c dependence at two loops in unitarized chiral perturbation theory

Peláez Sagredo, José RamónRíos, R.2023-06-202023-06-202006-12-150031-900710.1103/PhysRevLett.97.242002https://hdl.handle.net/20.500.14352/51723©2006 The American Physical Society.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.engNature of the f_0(600) scalar meson from its N_c dependence at two loops in unitarized chiral perturbation theoryjournal articlehttp://dx.doi.org/10.1103/PhysRevLett.97.242002http://journals.aps.orgopen access51-73π π-scatteringMulti-quark hadronsLow-energyForm-factorsPhase-shiftSigmaLagrangiansAmplitudeLightResonancesFísica-Modelos matemáticosFísica matemática