Aubert, B. et al. (2005) Measurement of CP asymmetries in B0→ϕK0 and B0→K+K-Ks0 decays. Physical Review D, 71 (9). 091102. ISSN 1550-7998
Abstract

We measure the time-dependent CP asymmetry parameters in B0→K+K-K0 based on a data sample of approximately 227×106 B-meson pairs recorded at the Υ(4S) resonance with the BABAR detector at the PEP-II B-meson Factory at SLAC. We reconstruct two-body B0 decays to ϕ(1020)KS0 and ϕ(1020)KL0, and the three-body decay K+K-KS0 with ϕ(1020)KS0 excluded. For the B0→ϕK0 decays, we measure sin⁡2βeff(ϕK0)=+0.50±0.25(stat)-0.04+0.07(syst). The B0→K+K-KS0 decays are dominated by K+K- S wave, as determined from an angular analysis; we measure sin⁡2βeff(K+K-KS0)=+0.55±0.22(stat)±0.04(syst)±0.11(CP), where the last error is due to the uncertainty in the fraction of CP-even contributions to the decay amplitude. We find no evidence for direct CP violation.

Information
Library
Statistics

View Item (login required)
View Item (login required)
Add to AnyAdd to TwitterAdd to FacebookAdd to LinkedinAdd to PinterestAdd to Email