# Amplitude Analysis of the $B^\pm \to \phi K*(892)^\pm$ Decay

Abstract : We perform an amplitude analysis of B+- -> phi(1020) K*(892)+- decay with a sample of about 384 million BBbar pairs recorded with the BABAR detector. Overall, twelve parameters are measured, including the fractions of longitudinal f_L and parity-odd transverse f_perp amplitudes, branching fraction, strong phases, and six parameters sensitive to CP-violation. We use the dependence on the Kpi invariant mass of the interference between the JP=1- and 0+ Kpi components to resolve the discrete ambiguity in the determination of the strong and weak phases. Our measurements of f_L=0.49+-0.05+-0.03, f_perp=0.21+-0.05+-0.02, and the strong phases point to the presence of a substantial helicity-plus amplitude from a presently unknown source.
Document type :
Journal articles

http://hal.in2p3.fr/in2p3-00149832
Contributor : Claudine Bombar <>
Submitted on : Monday, May 28, 2007 - 5:19:21 PM
Last modification on : Saturday, November 28, 2020 - 12:58:03 PM

### Citation

B. Aubert, M. Bona, D. Boutigny, Y. Karyotakis, J.P. Lees, et al.. Amplitude Analysis of the $B^\pm \to \phi K*(892)^\pm$ Decay. Physical Review Letters, American Physical Society, 2007, 99, pp.201802. ⟨10.1103/PhysRevLett.99.201802⟩. ⟨in2p3-00149832⟩

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