Improved measurement of CP asymmetries in $B^0 \to$ ($c \bar{c}$) $K^{(*)}$ 0 decays - INSPIRE

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Improved measurement of CP asymmetries in $B^0 \to$ ( $c \bar{c}$ ) $K^{(*)}$ 0 decays

BaBar

Collaboration

Jul, 2006

15 pages

Part of Proceedings of the 33rd International Conference on High Energy Physics (ICHEP '06) : Moscow, Russia, July 26-August 2, 2006

Contribution to:

- ICHEP 2006

e-Print:

hep-ex/0607107 [hep-ex]

Report number:

SLAC-PUB-11986,
BABAR-CONF-06-036

Experiments:

SLAC-PEP2-BABAR

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Abstract:

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.

Note:

15 pages, 2 postscript figues, submitted to ICHEP2006 Report-no: SLAC-PUB-11986, BABAR-CONF-06/036

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