Measurement of CP Asymmetries in B0 to Phi K0 and B0 to K+K-Ks Decays
- et al.; SLAC
We measure the time-dependent CP asymmetry parameters in B{sup 0} {yields} K{sup +}K{sup -}K{sup 0} based on a data sample of approximately 227 million B-meson pairs recorded at the {Upsilon}(4S) resonance with the BABAR detector at the PEP-II B-meson Factory at SLAC. We reconstruct two-body B{sup 0} decays to {phi}(1020)K{sub s}{sup 0} and {phi}(1020)K{sub L}{sup 0}, and the three-body decay K{sup +}K{sup -}K{sub s}{sup 0} with {phi}(1020)K{sub s}{sup 0} excluded. For the B{sup 0} {yields} {phi}K{sup 0} decays, they measure sin 2{beta}{sub eff}({phi}K{sup 0}) = +0.50 {+-} 0.25(stat){sub -0.04}{sup +0.07}(syst). The B{sup 0} {yields} K{sup +}K{sup -}K{sub s}{sup 0} decays are dominated by K{sup +}K{sup -} S-wave, as determined from an angular analysis; they measure sin 2{beta}{sub eff} (K{sup +}K{sup -}K{sub s}{sup 0}) = +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.
- Research Organization:
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- Contributing Organization:
- BABAR Collaboration
- DOE Contract Number:
- AC02-76SF00515
- OSTI ID:
- 839769
- Report Number(s):
- SLAC-PUB-11022; BABAR-PUB-04/051
- Country of Publication:
- United States
- Language:
- English
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