Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
2006-07-29
Physics
High Energy Physics
High Energy Physics - Experiment
15 pages, 2 postscript figues, submitted to ICHEP2006
Scientific paper
We present an updated measurements of time-dependent CP asymmetries in fully reconstructed neutral B decays to several CP eigenstates containing a charmonium meson. The measurements use a data sample of (347.5 +/- 3.8) x 10^{6} $\FourS \to B\Bbar$ decays collected with the babar detector at the PEP-II B factory between 1999 and 2006. We determine sin2beta = 0.710 +/- 0.034(stat) +/- 0.019(syst) and |\lambda| = 0.932 +/- 0.026(stat) +/- 0.017(syst). Both of these results are preliminary.
"The BABAR Collaboration
Aubert B.
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