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Measurement of time-dependent CP asymmetries in B0->D(*)+-pi-+ and B0->D+-rho-+ decays

The BABAR Collaboration·B. Aubert
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Abstract

We present updated results on time-dependent CP asymmetries in fully reconstructed B0->D(*)+-pi-+ and B0->D+-rho-+ decays in approximately 232 million Y(4S)->BBbar 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 2beta+gamma: a^{Dπ} = -0.010 +/- 0.023 +/- 0.007, c_{\rm lep}^{Dπ} = -0.033 +/- 0.042 +/- 0.012, a^{D^*π} = -0.040 +/- 0.023 +/- 0.010, c_{\rm lep}^{D^*π} = 0.049 +/- 0.042 +/- 0.015, a^{Dρ} = -0.024 +/- 0.031 +/- 0.009, c_{\rm lep}^{Dρ} = -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(2beta+gamma)| > 0.64 (0.40) at 68% (90%) confidence level.

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The BABAR Collaboration, B. Aubert. 2006-03-01. Measurement of time-dependent CP asymmetries in B0->D(*)+-pi-+ and B0->D+-rho-+ decays. https://doi.org/10.1103/physrevd.73.111101

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