Dyson-Schwinger studies of meson masses and decay constants

Abstract

The masses and decay constants of the light mesons are studied within a ladder-rainbow truncation of the set of Dyson-Schwinger equations using a model 2-point gluon function. The one phenomenological parameter and two current quark masses are fitted to reproduce $f_{\pi }$, $m_{\pi }$ and $m_K$. Our results for $f_K$, and for the vector mesons $\rho$, $\varphi$, and $K^{\star }$ are in good agreement with the experimental values.

Comments: 4 pages, uses espcrc1.sty, talk presented at PANIC99, Uppsala, Sweden