Measurement of Time-Dependent CP Asymmetries in B0 -> D(*)D Decays

Details Measurement of Time-Dependent CP Asymmetries in B0 -> D(*)D Decays Measurement of Time-Dependent CP Asymmetries in B0 -> D(*)D Decays

2005-05-27

arxiv.org/abs/hep-ex/0505092v2

Phys.Rev.Lett.95:131802,2005

Physics

High Energy Physics

High Energy Physics - Experiment

7 pages, 6 postscript figues, submitted to Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.95.131802

We present a first measurement of CP asymmetries in neutral B decays to D+D-, and updated CP asymmetry measurements in decays to D*+D- and D*-D+. We use fully-reconstructed decays collected in a data sample of (232 +- 3) x 10^6 Y(4S) -> BBbar events in the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC. We determine the time-dependent asymmetry parameters to be S_{D*+D-} = -0.54 +- 0.35 +- 0.07, C_{D*+D-} = 0.09 +- 0.25 +- 0.06, S_{D*-D+} = -0.29 +- 0.33 +- 0.07, C_{D*-D+} = 0.17 +- 0.24 +- 0.04, S_{D+D-} = -0.29 +- 0.63 +- 0.06, and C_{D+D-} = 0.11 +- 0.35 +- 0.06, where in each case the first error is statistical and the second error is systematic.

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