Low Energy Pion Double Charge Exchange Reactions and Dibaryon

A common characteristic of low energy pion-nucleus double charge exchange reactions is a resonance like peak around 50 MeV. It has been claimed that this peak provides evidence for the existence of hypothetical Dibaryon resonance d (2.06 GeV) at this energy. This article will show how this peak could be predicted using conventional sequential mechanism without invoking dibaryon degrees of freedom.