Measurement of time-dependent CP asymmetries in B-0 -> D-(*)+/-pi(-/+)and B-0 -> D-+/-rho(-/+) decays

B. Aubert, J.Y. Chen, K. Peters, L.L. Zhang, S. Chen, W. Wang, X.H. Li, M.A. Baak, H.J. Bulten, G. Raven, H. Snoek, P. David, N. de Groot, N. van Bakel, Z. Yu

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We present updated results on time-dependent CP asymmetries in fully reconstructed B0→D(*)±π∓ and B0→D±ρ∓ decays in approximately 232×106 Υ(4S)→B¯¯¯B events collected with the BABAR detector at the PEP-II asymmetric-energy B factory at SLAC. From a time-dependent maximum-likelihood fit we obtain for the parameters related to the CP violation angle 2β+γ: aDπ=−0.010±0.023±0.007, cDπlep=−0.033±0.042±0.012, aD∗π=−0.040±0.023±0.010, cD∗πlep=0.049±0.042±0.015,aDρ=−0.024±0.031±0.009, cDρlep=−0.098±0.055±0.018, where the first error is statistical and the second is systematic. Using other measurements and theoretical assumptions, we interpret the results in terms of the angles of the Cabibbo-Kobayashi-Maskawa unitarity triangle and find |sin(2β+γ)|>0.64  (0.40) at 68% (90%) confidence level.
Original languageEnglish
Article number111101(R)
JournalPhysical Review D
Issue number11
Publication statusPublished - 1 Jun 2006


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