Charm CP violation and mixing at Belle

11th International Conference on Hyperons, Charm and Beauty Hadrons

Ko, Byeong Rok^1,1

Korea University, Seoul

136-713, Korea, Republic of^1

关键词: CP asymmetries;    CP violations;    CP-violation parameters;    Mixing parameters;    No-mixing;    Precise mixing;    Standard deviation;    The standard model;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/556/1/012058/pdf
DOI  :  10.1088/1742-6596/556/1/012058

来源: IOP

【 摘 要 】

We present charm CP violation and mixing measurements at Belle. They are the first observation of D0- D¯0mixing in e+e-collisions from D0→ K+π-decays, the most precise mixing and indirect CP violation parameters from D0→ K0Sπ+π-decays, and the timeintegrated CP asymmetries in D0→ π0π0and D0→ K0Sπ0decays. Our mixing measurement in D0→ K+π-decays excludes the no-mixing hypothesis at the 5.1 standard deviation level. The mixing parameters x = (0.56 ± 0.19+0.03+0.06-0.09-0.09)%, y = (0.30 ± 0.15+0.04+0.03-0.05-0.06)% and indirect CP violation parameters |q/p| = (0.90+0.16+0.05+0.06-0.15-0.04-0.05)%, arg(q/p) = (-6 ± 11 ± 3+3-4)° measured from D0→ K0Sπ+π-decays, and the time-integrated CP asymmetries AD0→π0π0CP= (-0.03 ± 0.64 ± 0.10)% and AD0→K0Sπ0CP= (-0.21 ± 0.16 ± 0.07)% are the most precisemeasurements to date. Our measurements here are consistent with predictions of the standard model.