Abstract
We measure the direct violation asymmetry, , in and the isospin difference of the asymmetry, , using of data collected at resonance with the BABAR detector at the PEP-II asymmetric-energy storage rings operating at the SLAC National Accelerator Laboratory. mesons are reconstructed from ten charged final states and six neutral final states. We find , which is in agreement with the Standard Model prediction and provides an improvement on the world average. Moreover, we report the first measurement of the difference between for charged and neutral decay modes, . Using the value of , we also provide 68% and 90% confidence intervals on the imaginary part of the ratio of the Wilson coefficients corresponding to the chromomagnetic dipole and the electromagnetic dipole transitions.
- Received 4 June 2014
DOI:https://doi.org/10.1103/PhysRevD.90.092001
© 2014 American Physical Society