We present a measurement of time-dependent CP-violating asymmetries in decays of neutral B mesons to the final states D*∓π±, using approximately 82×10^6 BB̅ events recorded by the BABAR experiment at the PEP-II e+e- storage ring. Events containing these decays are selected with a partial reconstruction technique, in which only the high-momentum π± from the B decay and the low-momentum π∓ from the D*∓ decay are used. We measure the amplitude of the asymmetry to be -0.063±0.024(stat)±0.014(syst) and compute bounds on |sin(2β+γ)|.
Measurement of Time-Dependent CP Asymmetries and Constraints on sin(2β+γ) with Partial Reconstruction of B0→D*∓π± Decays
MARGONI, MARTINO;SIMONETTO, FRANCO;STROILI, ROBERTO;VOCI, CESARE;SIMI, GABRIELE;
2004
Abstract
We present a measurement of time-dependent CP-violating asymmetries in decays of neutral B mesons to the final states D*∓π±, using approximately 82×10^6 BB̅ events recorded by the BABAR experiment at the PEP-II e+e- storage ring. Events containing these decays are selected with a partial reconstruction technique, in which only the high-momentum π± from the B decay and the low-momentum π∓ from the D*∓ decay are used. We measure the amplitude of the asymmetry to be -0.063±0.024(stat)±0.014(syst) and compute bounds on |sin(2β+γ)|.
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