Measurement of CP asymmetries in B-0 ->phi K-0 and B-0 -> K+ K- K-s(0) decays

Journal article

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 (1020)KS0 and (1020)KL0, and the three-body decay K+K-KS0 with (1020)KS0 excluded. For the B0→K0 decays, we measure sin 2βeff(K0)=+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. © 2005 The American Physical Society.

Authors: Aubert, B; Barate, R; Boutigny, D; Couderc, F; Karyotakis, Y

• Publication status: Published
• Journal: Physical Review D
• Volume: 71
• Issue: 9
• Pages: 1-8
• Publication date: 2005-05-01
• DOI: 10.1103/PhysRevD.71.091102
• EISSN: 1550-2368
• ISSN: 1550-7998
• Language: English