Measurement of the branching fraction and time-dependent asymmetry for decays

Pal, B.*; 谷田 聖; Belle Collaboration*; 他158名*

Physical Review D, 98(11), p.112008_1 - 112008_8, 2018/12

AA2018-0764.pdf:0.49MB

https://doi.org/10.1103/PhysRevD.98.112008

We measure the branching fraction and time-dependent -violating asymmetry for decays using a data sample of 711 collected on the resonance by the Belle experiment running at the KEKB collider. The branching fraction is measured to be , which is the most precise measurement to date. The measured asymmetry parameters are and . The mixing-induced asymmetry () differs from the case of no violation by 3.0 standard deviations, and the direct asymmetry () is consistent with zero.