We report the first measurement of the charm-mixing parameter yCP in D0 decays to the CP-odd final state K0 ?. The study uses the full Belle eþe-annihilation data sample of 976 fb-1 taken at or near the ? 4S centre-of-mass energy. We find yCP 0.96 0.91 0.62-þ0.17 %, where the first uncertainty is statistical, the second is systematic due to event selection and background, and the last is due to possible of CP-even decays in the data sample.
Revised: December 30, 2020 |
Published: October 1, 2020
Citation
Nayak M., D. Cinabro, I. Adachi, H. Aihara, S. Al Said, D. Asner, and H. Atmacan, et al. 2020.Measurement of the charm-mixing parameter yCP in D0-> K0sw decays at Belle.Physical Review D 102, no. 7:Article No. 071102(R).PNNL-SA-158830.doi:10.1103/PhysRevD.102.071102