Branching Fractions and CP Asymmetries in B0 --> K+ K- K0S and B+ --> K+ K0S K0S

Abstract

We measure the branching fractions and CP asymmetries in the decays B0 --> K+K-K0S and B+ --> K+K0S K0S using a sample of approximately 122 million BBbar pairs collected by the BaBar detector. From a time-dependent analysis of the K+ K- K0S sample that excludes phi K0S, the values of the CP-violation parameters are S = -0.56 +/- 0.25 +/- 0.04 and C = -0.10 +/- 0.19 +/- 0.10, where the first uncertainty is statistical, the second is systematic. We confirm that the final state is nearly purely CP-even. Using this result and setting C=0, we extract the Standard Model parameter sin2beta = 0.57 +/- 0.26 +/- 0.04 +0.17/-0 where the last error is due to uncertainty on the CP content. We present the first measurement of the CP-violating charge asymmetry ACP(B+ --> K+K0S K0S) = -0.04 +/- 0.11 +/- 0.02, with a 90% confidence-level interval of [-0.23, 0.15]. The branching fractions are BF(B0 --> K+K-K0) = (23.8 +/- 2.0 +/- 1.6) x 10^{-6} and BF(B+ --> K+K0S K0S) = (10.7 +/- 1.2 +/- 1.0) x 10^{-6}.

arXiv comment7 pages, 2 postscript figures; submitted to Phys. Rev. Lett

References in corpus (13)

• The BABAR Detector
• CP Asymmetries in B Decays with New Physics in Decay Amplitudes
• Measurement of the CP-Violating Asymmetry Amplitude sin2beta
• Measuring the CP Angle βin Hadronic b\to s Penguin Decays
• CP Violation and the Role of Electroweak Penguins in Non-leptonic B Decays
• Hadronic Penguin B Decays In The Standard And The Two-Higgs-Doublet Models
• Impact of tag-side interference on time-dependent CP asymmetry measurements using coherent B0 B0bar pairs
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• Measurement of Time-Dependent CP-Violating Asymmetries in B0 --> phi Ks0, K+ K- Ks0, and eta' Ks0 Decays
• Study of B meson decays to three-body charmless hadronic final states
• I-spin, U-spin, and penguin dominance in $B\to KK\bar{K}$
• Measurement of the Time-Dependent CP Asymmetry in the B0 --> Phi K0 Decay
• Measurements of branching fractions in B -> phi K and B -> phi pi and search for direct CP violation in B+/- -> phi K+/-

Cited by in corpus (12)

• sPlot: a statistical tool to unfold data distributions
• Dalitz analysis of the three-body charmless decays B+=>K+Pi+Pi- and B+=>K+K+K-
• Charmless Three-body Decays of B Mesons
• Measurement of the Cabibbo-Kobayashi-Maskawa angle gamma in B-+ -> D(*)K-+ decays with a Dalitz analysis of D -> K0s pi- pi+
• Symmetry relations in charmless B->PPP decays
• Measurement of CP Asymmetries in B0 --> Phi K0 and B0 --> K+K-K0S Decays
• Measurements of CP-Violating Asymmetries in the Decay B0-->K+K-K0
• Charmless Hadronic B-Meson Decays
• Measurements of the Branching Fraction and CP-Violation Asymmetries in B^0-->f0(980)Ks
• Measurement of the Branching Fraction and the CP-Violating Asymmetry for the Decay B0 --> K0S Pi0
• Measurement of CP Asymmetry in B0 to Ks pi0 pi0 Decays
• Search for the decay B0 --> K0_S K0_S K0_L