Study of CP violation in Dalitz-plot analyses of B0 --> K+K-KS, B+ --> K+K-K+, and B+ --> KSKSK+

Abstract

We perform amplitude analyses of the decays $B^0\to K^{+}{K}^{-}{K}_S^0$, $B^{+}\to K^{+}{K}^{-}{K}^{+}$, and $B^{+}\to K_S^0{K}_S^0{K}^{+}$, and measure CP-violating parameters and partial branching fractions. The results are based on a data sample of approximately $470\times 10^6$ $B\bar{B}$ decays, collected with the BABAR detector at the PEP-II asymmetric-energy $B$ factory at the SLAC National Accelerator Laboratory. For $B^{+}\to K^{+}{K}^{-}{K}^{+}$, we find a direct CP asymmetry in $B^{+}\to \varphi (1020)K^{+}$ of $A_{CP}=(12.8\pm 4.4\pm 1.3)$, which differs from zero by $2.8\sigma$. For $B^0\to K^{+}{K}^{-}{K}_S^0$, we measure the CP-violating phase ${\beta }_{\mathrm{eff}}(\varphi (1020)K_S^0)=(21\pm 6\pm 2{)}^{\circ }$. For $B^{+}\to K_S^0{K}_S^0{K}^{+}$, we measure an overall direct CP asymmetry of $A_{CP}=(4_{-5}^{+4}\pm 2)$. We also perform an angular-moment analysis of the three channels, and determine that the $f_X(1500)$ state can be described well by the sum of the resonances $f_0(1500)$, $f_2^{\prime }(1525)$, and $f_0(1710)$.

35 pages, 68 postscript figures. v3 - minor modifications to agree with published version

References in corpus (4)

• Observation of Time-Dependent CP Violation in B0 -> eta' K0 Decays and Improved Measurements of CP Asymmetries in B0 -> phiK0, KsKsKs and B0 -> J/psi K0 Decays
• Penguin-dominated B -> PV decays in NLO perturbative QCD
• Measurement of CP violating asymmetries in B^0 -> K^+K^- K^0_S decays with a time-dependent Dalitz approach
• Amplitude analysis and measurement of the time-dependent CP asymmetry of $B^0\to K_0^S{K}_0^S{K}_0^S$ decays

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