Phenomenological test of the large N_c ChPT predictions for the pseudoscalar mixing parameters

Abstract

A phenomenological analysis of various decay processes is performed in order to test the large $N_c$ Chiral Perturbation Theory predictions for the octet and singlet pseudoscalar decay constants and mixing angles. The results obtained hint at a disagreement with the expectations of this theoretical framework although the statistical significance is still limited.

Comments: 7 pages, uses appolb style. Talk presented at the PHOTON2005 International Conference on the Structure and Interactions of the Photon, Warsaw, Poland, 31.8-4.9.2005