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Phys. Rev. Lett. 99, 171803 (2007) [7 pages]

Improved Measurement of CP Violation in Neutral B Decays to cc̅ s

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B. Aubert et al. BABAR Collaboration
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Received 12 March 2007; published 25 October 2007

We present updated measurements of time-dependent CP asymmetries in fully-reconstructed neutral B decays to several CP eigenstates containing a charmonium meson. The measurements use a data sample of (383±4)×106Υ(4S)→BB̅ decays collected with the BABAR detector at the PEP-II B factory. We determine sin⁡2β=0.714±0.032(stat)±0.018(syst) and |λ|=0.952±0.022(stat)±0.017(syst).

© 2007 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.99.171803
DOI:
10.1103/PhysRevLett.99.171803
PACS:
13.25.Hw, 11.30.Er, 12.15.Hh