Time-dependent and time-integrated angular analysis of BφKS0π0 and φK±π

B. Aubert et al. (BABAR Collaboration)
Phys. Rev. D 78, 092008 – Published 18 November 2008

Abstract

We perform a time-dependent and time-integrated angular analysis of the decays B0φK*(892)0, φK2*(1430)0, and φ(Kπ)0*0 with the final sample of about 465×106 BB¯ pairs recorded with the BABAR detector. Twenty-four parameters are investigated, including the branching fractions, CP-violation parameters, and parameters sensitive to final-state interactions. We use the dependence on the Kπ invariant mass of the interference between the scalar and vector or tensor components to resolve discrete ambiguities of the strong and weak phases. We use the time evolution of the BφKS0π0 channel to extract the CP-violation phase difference Δϕ00=0.28±0.42±0.04 between the B and B¯ decay amplitudes. When the BφK±π channel is included, the fractions of longitudinal polarization fL of the vector-vector and vector-tensor decay modes are measured to be 0.494±0.034±0.013 and 0.9010.058+0.046±0.037, respectively. This polarization pattern requires the presence of a positive-helicity amplitude in the vector-vector decay from a currently unknown source.

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  • Received 26 August 2008

DOI:https://doi.org/10.1103/PhysRevD.78.092008

©2008 American Physical Society

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Vol. 78, Iss. 9 — 1 November 2008

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