Mixing and CP violation in D0 → K − π + decays

Journal of High Energy Physics

Tommaso Pajero¹  Michael Joseph Morello² 

[1]Department of Physics, University of Oxford

[2]Scuola Normale Superiore

关键词: Charm Physics;    CP Violation;    Oscillation;    Hadron-Hadron Scattering;   

DOI  :  10.1007/JHEP03(2022)162

来源: DOAJ

【 摘 要 】

Abstract We review the experimental methods to measure mixing and time-dependent CP violation in D 0 decays into two hadrons. While these phenomena are usually neglected for D 0 → K − π + decays, this approximation is not always justified. In particular, it produces a bias on the measurement of the parameter y CP , when this is performed by relying on D 0 → 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 D 0 → K − π + and untagged D → K − π + decays, where D stands for either of the D 0 and D ¯ $$ \overline{D} $$ 0 mesons. Contrary to Cabibbo-suppressed D 0 → 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.

【 授权许可】

Unknown