Comments on the large Nc behavior of light scalars

I review the large Nc behavior of light resonances generated from unitarized one-loop Chiral Perturbation Theory. In contrast with the ρ or K*, the scalar behavior is at odds with a q-bar q dominant component. In fact, in the light scalar region, meson-meson amplitudes vanish as Nc increases. Also, the scalar widths, obtained from their associated poles, behave as O(Nc1/2) < Γ < O(Nc). We also clarify on the physical relevance of considering large Nc not too far from real life, Nc = 3, and the interpretation of the mathematical Nc → ∞ limit. (author)