Mixing and CP violation in D-0 -> K-pi(+) decays

Journal article

We review the experimental methods to measure mixing and time-dependent CP violation in D0 decays into two hadrons. While these phenomena are usually neglected for D0 → K−π+ decays, this approximation is not always justified. In particular, it produces a bias on the measurement of the parameter yCP, when this is performed by relying on D0 → K−π+ decays as a normalisation channel, whose size is around 40% of the precision of the current world average. Finally, we estimate the sensitivity to the weak mixing phases achievable by studying D0 → K−π+ and untagged D → K−π+ decays, where D stands for either of the D0 and D¯ 0 mesons. Contrary to Cabibbo-suppressed D0 → h+h− decays, these decay channels allow to measure these phases without final-state dependent nuisance contributions from the decay amplitudes, but their sensitivity is lower by a factor of six.

Authors: Pajero, T; Morello, MJ

• Publication status: Published
• Peer review status: Peer reviewed
• Publisher: Springer
• Journal: Journal of High Energy Physics
• Volume: 2022
• Issue: 3
• Article number: 162
• Publication date: 2022-03-24
• Acceptance date: 2022-02-28
• DOI: 10.1007/JHEP03(2022)162
• EISSN: 1029-8479
• ISSN: 1126-6708
• Language: English
• Keywords: CP violation; charm physics; FFR; hadron-hadron scattering; oscillation