Effective $\Delta S=1$ weak chiral Lagrangian from the instanton-induced chiral quark model

Abstract

We present the recent investigation of the $\Delta S=1$ effective weak chiral Lagrangian within the framework of the instanton-induced chiral quark model. Starting from the effective four-quark operators, we derive the effective weak chiral action by integrating out the constituent quark fields. Employing the derivative expansion, we obtain the effective weak chiral Lagrangian to $\mathcal{O}(p^4)$ order with low energy constants.

Comments: Talk given at the 1998 YITP Workshop on QCD and Hadron Physics, 14-16 October, Kyoto, Japan. 5 pages with 1 figure