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

Abstract

Measurements of D 0 - mixing and CP violation in D 0 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 D 0 - mixing and CP violation in charm meson decays at BaBar and Belle experiments. In particular, the D 0 - mixing parameters in D 0 → 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 D 0 → K 0 S π + π − π0 is performed at the Belle experiment with aCP = (−0.28 ±1.38+0.23 -0.76 )×10−3 , which is consistent with no CP violation. The measurements of CP asymmetry in D 0 → K S0 K0Swith ACP = (−2.9±5.2±2.2)% and D + → π+ π0 with ACP = (+2.31 ± 1.24 ± 0.23)% are also reported, which shows no CP violation.