Measurement of CP-voilating parameters in fully reconstructed B->D(*)+-pi-+ and B->D+-rho-+ decays

Details Measurement of CP-voilating parameters in fully reconstructed B->D(*)+-pi-+ and B->D+-rho-+ decays Measurement of CP-voilating parameters in fully reconstructed B->D(*)+-pi-+ and B->D+-rho-+ decays

2005-07-18

arxiv.org/abs/hep-ex/0507075v1

Physics

High Energy Physics

High Energy Physics - Experiment

17 pages, 5 figures, Submitted to International Europhysics Conference On High-Energy Physics (HEP 2005), Lisbon, Portugal

Scientific paper

We present a preliminary measurement of the CP-violating parameters in fully reconstructed B->D^(*)+-pi-+ and B->D^+-rho-+ decays in approximately 232 million Y(4S)->BBbar$ decays collected with the BaBar detector at the PEP-II asymmetric-energy B factory at SLAC. From a maximum likelihood fit to the time-dependent decay distributions we obtain for the parameters related to the CP violation quantity sin(2beta+gamma): a[Dpi] = -0.013 +/- 0.022 (stat.) +/- 0.007 (syst.), clep[Dpi] = -0.043 +/- 0.042 (stat.) +/- 0.011 (syst.), a[D*pi] = -0.043 +/- 0.023 (stat.) +/- 0.010 (syst.), clep[D*pi] = 0.047 +/- 0.042 (stat.) +/- 0.015 (syst.), a[Drho] = -0.024 +/- 0.031 (stat.) +/- 0.010 (syst.), clep[Drho] = -0.098 +/- 0.055 (stat.) +/- 0.019 (syst.).

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