Contributions to the width difference in the neutral D system from hadronic decays

• DOI: 10.1016/j.physletb.2015.08.063
• Publication Date: 2015-09-04T11:09:23Z
• Authors: T. Gershon; J. Libby; G. Wilkinson
• Keywords: CP violation; D meson

Recent studies of several multi-body $D^0$ meson decays have revealed that the final states are dominantly $CP$-even. However, small value width difference between two physical eigenstates $D^0$-$\overline{D}{}^0$ system indicates total widths to $CP$-even and $CP$-odd should be same within about a percent. The known contributions from hadronic discussed, it is shown an apparent excess quasi-$CP$-even modes balanced, current uncertainty, by interference effects in quasi-flavour-specific decays. Decay which may significantly affect picture with improved measurements considered.