Measurement of Time-Dependent CP Asymmetry in B⁰→ D^(*)±π^∓ Decays and Constraints on sin(2β+γ)

2003/09/30 by The BABAR Collaboration, B. Aubert
Physics and Astronomy · #hep-ex

paper · pdf

published as Phys.Rev.Lett. 92 (2004) 251801 · This paper has been withdrawn by the authors because it is a multiple posting of the same result. Please find the version of the paper published on Phys. Rev. Lett. in hep-ex/0308018

arxiv created 2004/08/26 · arxiv updated 2009/12/01

Abstract

We present a measurement of time-dependent CP-violating asymmetries in fully reconstructed B⁰->D^(*)±π^∓ decays in a data sample of approximately 88 million Y(4S)→ BB decays collected with the BaBar detector at the PEP-II asymmetric-energy B factory at SLAC. We interpret the results in terms of the angles of the Cabibbo-Kobayashi-Maskawa unitarity triangle, and find |sin(2β+γ)|>0.69 at 68% confidence level. We exclude the hypothesis of no CP-violation (sin(2β+γ) = 0) at 83% confidence level.

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