Measurement of CP-violating parameters in fully reconstructed B→ D^(*)π and B→ Dρ decays

2004/08/14 by The BABAR Collaboration, B. Aubert, Aubert, B.
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #hep-ex

paper · pdf · doi:10.48550/arxiv.hep-ex/0408059

14 pages, 5 postscript figues, submitted to ICHEP2004

arxiv created 2004/08/14 · arxiv updated 2009/12/01

Abstract

We present a preliminary measurement of CP-violating asymmetries in fully reconstructed B⁰→D^(*)±π^∓ and \B⁰→D^±ρ^∓ decays in approximately 110 million Υ(\rm 4S) → BB 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 CP-violating parameters: a^Dπ = -0.032±0.031 (\textrmstat.)± 0.020 (\textrmsyst.), c_{\rm lep}^Dπ = -0.059±0.055 (\textrmstat.)± 0.033 (\textrmsyst.) on the B⁰→D^±π^∓ sample, a^{D^*π} = -0.049±0.031 (\textrmstat.)± 0.020 (\textrmsyst.), c_{\rm lep}^{D^*π} = +0.044±0.054 (\textrmstat.)± 0.033 (\textrmsyst.) on the B⁰→D^*±π^∓ sample, and a^Dρ = -0.005±0.044 (\textrmstat.)± 0.021 (\textrmsyst.), c_{\rm lep}^Dρ = -0.147±0.074 (\textrmstat.)± 0.035 (\textrmsyst.) on the B⁰→D^±ρ^∓ sample.

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