Violation Of The $ΔI = 1/2$ Rule In $D \to ππ$ Decays

Abstract

A strong violation of the $\displaystyle{ΔI = {1\over 2}} $ rule has experimentally been found in the $\displaystyle{D \to ππ}$ decays [1]. In this letter we will show that the order of magnitude of this violation can be understood in terms of the pure quantum chromo dynamics corrections to the weak interactions.