We present an updated measurement of time-dependent CP asymmetries and the CP-odd fraction in the decay B-0 -> D*+D*- using 232x10(6)B (B) over bar pairs collected by the BABAR detector at the SLAC PEP-II B factory. We determine the CP-odd fraction to be 0.125 +/- 0.044(stat) +/- 0.007(syst). The time-dependent CP asymmetry parameters C+ and S+ are determined to be 0.06 +/- 0.17(stat)+/- 0.03(syst) and -0.75 +/- 0.25(stat) +/- 0.03(syst), respectively. The standard model predicts these parameters to be 0 and -sin2 beta, respectively, in the absence of penguin amplitude contributions.

Measurement of time-dependent CP asymmetries and the CP-odd fraction in the decay B-0 -> D-* + D*-

FERRONI, Fernando
2005

Abstract

We present an updated measurement of time-dependent CP asymmetries and the CP-odd fraction in the decay B-0 -> D*+D*- using 232x10(6)B (B) over bar pairs collected by the BABAR detector at the SLAC PEP-II B factory. We determine the CP-odd fraction to be 0.125 +/- 0.044(stat) +/- 0.007(syst). The time-dependent CP asymmetry parameters C+ and S+ are determined to be 0.06 +/- 0.17(stat)+/- 0.03(syst) and -0.75 +/- 0.25(stat) +/- 0.03(syst), respectively. The standard model predicts these parameters to be 0 and -sin2 beta, respectively, in the absence of penguin amplitude contributions.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.12571/2974
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