1304.5121 (J. R. Pelaez et al.)

Properties and composition of the $f_0(500)$ resonance    [PDF]

J. R. Pelaez, J. Nebreda, G. Ríos, J. Ruiz de Elvira

In this talk we review our recent developments on the understanding of the nature of the f_0(500) resonance---or sigma meson---coming from the N_c expansion, dispersion relations with Chiral Perturbation Theory, as well as finite energy sum rules and semi-local duality.

View original: http://arxiv.org/abs/1304.5121