The $\Delta I=1/2$ Rule in the Light of Two-Dimensional QCD

John Ellis, Yitzhak Frishman, Amihay Hanany +1

We calculate in QCD${}_2$ the ratios of baryonic matrix elements of $\Delta I=2$ and $\Delta I=0$ four-fermion operators, with a view to understanding better the mechanism of $\Delta I=1/2$ enha…