D⁰-${\overline{D}}^0$ mixing and CPV measurements at the B-factories

Universityof Science andTechnologyof China (USTC)  

^* e-mail: chenyq15@mail.ustc.edu.cn

Published online: 13 March 2019

Abstract

Measurements of D⁰-${\overline{D}}^0$ mixing and CP violation in D⁰ decays are interesting as any difference with respect to the Standard Model prediction would be a signature of new physics. We report on recent searches and measurements of D⁰-${\overline{D}}^0$ mixing and CP violation in charm meson decays at BaBar and Belle experiments. In particular, the D⁰-${\overline{D}}^0$ mixing parameters in D⁰ → π⁺ π ⁻ π⁰ are measured by the BaBar experiment for the first time with x = (1.5±1.2±0.6)% and y = (0.2±0.9±0.5)%. The first T-odd asymmetry measurement in D⁰ → K⁰_Sπ ⁺ π ⁻ π⁰ is performed at the Belle experiment with a_CP = (−0.28 ±1.38^+0.23_-0.76)×10⁻³, which is consistent with no CP violation. The measurements of CP asymmetry in D⁰ → K_S⁰K0Swith ACP = (−2.9±5.2±2.2)% and D⁺ → π⁺π⁰ with A_CP = (+2.31 ± 1.24 ± 0.23)% are also reported, which shows no CP violation.