We measure the branching fraction and CP violation asymmetry in the decay B0 ! 00, using a data sample of 752 106 BB pairs collected at the (4S) resonance with the Belle detector at the KEKB e+e collider. The obtained branching fraction and direct CP asymmetry are B(B !00) = [1:31 0:19 (stat.) 0:19 (syst.)] 106 and ACP = +0:14 0:36 (stat.) :10 (syst.); respectively. The signal signicance, including the systematic uncertainty, is 6.4 standard deviations. We combine these results with Belle's earlier measurements of B0 ! + and B ! 0 to exclude the CP-violating parameter 2 from the range 15:5
Revised: September 6, 2017 |
Published: August 31, 2017
Citation
Julius T., M. Sevior, G.B. Mohanty, I. Adachi, H. Aihara, S. Al Said, and D.M. Asner, et al. 2017.Measurement of the branching fraction and CP asymmetry in B0->p0p0 decays, and an improved constraint on ?2.Physical Review D 96, no. 3:Article No. 032007.PNNL-SA-128818.doi:10.1103/PhysRevD.96.032007