Meson-Meson interaction in a non-perturbative chiral approach
Abstract
A non-perturbative method which combines constraints from chiral symmetry breaking and coupled channel unitarity is used to describe the meson-meson interaction up to about 1.2 GeV. The approach uses the O(p^2) and O(p^4) chiral Lagrangians. The seven free parameters of the O(p^4) Lagrangian are fitted to the data. The results are in good agreement with a vast amount of experimental analyses. The amplitudes develop poles in the complex plane corresponding to the f0, a0, rho, K*, phi, sigma and kappa resonances; the latter two, very broad. The total and partial decay widths of the resonances are also well reproduced. Further extensions and applications of this chiral non-perturbative scheme are also discussed.
Keywords
Cite
@article{arxiv.hep-ph/9804209,
title = {Meson-Meson interaction in a non-perturbative chiral approach},
author = {J. A. Oller and E. Oset and J. R. Pelaez},
journal= {arXiv preprint arXiv:hep-ph/9804209},
year = {2014}
}
Comments
27 pages, 12 figures. LaTeX, uses psfig