We report the measurement of the direct CP asymmetry in the radiative B¯?Xs+d? decay using a data sample of (772±11)×106 BB¯ pairs collected at the ?(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. The CP asymmetry is measured as a function of the photon energy threshold. For E*?=2.1 GeV, where E*? is the photon energy in the center-of-mass frame, we obtain ACP(B¯?Xs+d?)=(2.2±3.9±0.9)%, consistent with the Standard Model prediction.
Revised: December 12, 2019 |
Published: April 17, 2015
Citation
Pesantez L., P. Urquijo, J. Dingfelder, A. Abdesselam, I. Adachi, K. Adamczyk, and H. Aihara, et al. 2015.Measurement of the direct CP asymmetry in B¯->Xs+dy decays with a lepton tag.Physical Review Letters 114, no. 15:Article No. 151601.PNNL-SA-108243.doi:10.1103/PhysRevLett.114.151601