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) -> BB B 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.

Measurement of time-dependent CP asymmetries in B-0 ->(DD -/+)-D-(*)+/- decays / B. Aubert, R. Barate, D. Boutigny, F. Couderc, Y. Karyotakis, J.P. Lees, V. Poireau, V. Tisserand, A. Zghiche, E. Grauges, A. Palano, M. Pappagallo, A. Pompili, J.C. Chen, N.D. Qi, G. Rong, P. Wang, Y.S. Zhu, G. Eigen, I. Ofte, B. Stugu, G.S. Abrams, M. Battaglia, A.W. Borgland, A.B. Breon, D.N. Brown, J. Button-Shafer, R.N. Cahn, E. Charles, C.T. Day, M.S. Gill, A.V. Gritsan, Y. Groysman, R.G. Jacobsen, R.W. Kadel, J. Kadyk, L.T. Kerth, Y.G. Kolomensky, G. Kukartsev, G. Lynch, L.M. Mir, P.J. Oddone, T.J. Orimoto, M. Pripstein, N.A. Roe, M.T. Ronan, W.A. Wenzel, M. Barrett, K.E. Ford, T.J. Harrison, A.J. Hart, C.M. Hawkes, S.E. Morgan, A.T. Watson, M. Fritsch, K. Goetzen, T. Held, H. Koch, B. Lewandowski, M. Pelizaeus, K. Peters, T. Schroeder, M. Steinke, J.T. Boyd, J.P. Burke, N. Chevalier, W.N. Cottingham, M.P. Kelly, T. Cuhadar-Donszelmann, C. Hearty, N.S. Knecht, T.S. Mattison, J.A. McKenna, A. 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Measurement of time-dependent CP asymmetries in B-0 ->(DD -/+)-D-(*)+/- decays

A. Lazzaro;V. Lombardo;F. Palombo;N. Neri;
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) x 10(6) Y (4S) -> BB B 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.
B mesons; CP invariance; meson hadronic decay
Settore FIS/01 - Fisica Sperimentale
2005
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/16623
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