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)×106 Υ(4S)→BB̄ events in the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC. We determine the time-dependent asymmetry parameters to be SD*+D-=-0.54±0. 35±0.07, CD*+D-=0.09±0.25±0.06, SD*-D+=-0. 29±0.33±0.07, CD*-D+=0.17±0.24±0.04, SD+D-=-0.29±0.63±0.06, and CD+D-=0.11±0.35±0.06, where in each case the first error is statistical and the second error is systematic.

Aubert, B., Barate, R., Boutigny, D., Couderc, F., Karyotakis, Y., Lees, J., et al. (2005). Measurement of time-dependent CP asymmetries in B0→D(*)±D decays. PHYSICAL REVIEW LETTERS, 95(13) [10.1103/PhysRevLett.95.131802].

Measurement of time-dependent CP asymmetries in B0→D(*)±D decays

CARPINELLI, Massimo;
2005

Abstract

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)×106 Υ(4S)→BB̄ events in the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC. We determine the time-dependent asymmetry parameters to be SD*+D-=-0.54±0. 35±0.07, CD*+D-=0.09±0.25±0.06, SD*-D+=-0. 29±0.33±0.07, CD*-D+=0.17±0.24±0.04, SD+D-=-0.29±0.63±0.06, and CD+D-=0.11±0.35±0.06, where in each case the first error is statistical and the second error is systematic.
Articolo in rivista - Articolo scientifico
Error analysis; Measurement theory; Parameter estimation; Statistical methods; Asymmetry measurements; Asymmetry parameters; Reconstructed decays; Molecular structure;
English
B. Aubert et al. (BABAR Collaboration)
Aubert, B., Barate, R., Boutigny, D., Couderc, F., Karyotakis, Y., Lees, J., et al. (2005). Measurement of time-dependent CP asymmetries in B0→D(*)±D decays. PHYSICAL REVIEW LETTERS, 95(13) [10.1103/PhysRevLett.95.131802].
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