Light pseudoscalar mesons in a nonlocal three flavor chiral quark model

DANIEL GOMEZ DUMM; ALBERTO SCARPETTINI; NORBERTO N. SCOCCOLA

Angra dos Reis

Congreso; 9th Hadron Physics and 7th Relativistic Aspects of Nuclear Physics (HADRON-RANP 2004): A Joint Meeting on QCD and QGP; 2004

We study the properties of light pseudoscalar mesons in a three flavor chiral quark model with nonlocal separable interactions.We consider the case of a Gaussian regulator, evaluating meson masses and decay constants. Our results are found to be in good agreement with empirical values, in particular, in the case of the ratio  f_K / f_pi  and the decay  pi0 -> gamma gamma. The model leads also to a reasonable description of the observed phenomenology in the  eta-eta´  sector, where two significantly different mixing angles are required. Detailed description of the work sketched here can be found in Ref. [1].