Comments on the large Nc behavior of light scalars

Details Comments on the large Nc behavior of light scalars Comments on the large Nc behavior of light scalars

2005-09-26

arxiv.org/abs/hep-ph/0509284v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

To appear in the Proceedings of the Rencontres de Blois EDS05 Conference. Chateau de Blois, May 15-20,2005. France

Scientific paper

I review the large Nc behavior of light resonances generated from unitarized one-loop Chiral Perturbation Theory. In contrast with the rho or K*, the scalar behavior is at odds with a qqbar "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(Nc^{1/2})

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