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Observation of direct CP violation in the measurement of the Cabibbo-Kobayashi-Maskawa angle γ with B[superscript ±]→D[superscript (*)]K[superscript (*)±] decays

Author(s)
Cowan, Ray Franklin; Dujmic, Denis; Sciolla, Gabriella
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Abstract
We report the determination of the Cabibbo-Kobayashi-Maskawa CP-violating angle γ through the combination of various measurements involving B[superscript ±]→DK[superscript ±], B[superscript ±]→D*K[superscript ±], and B[superscript ±]→DK[*superscript ±] decays performed by the BABAR experiment at the PEP-II e+e- collider at SLAC National Accelerator Laboratory. Using up to 474 million BB̅ pairs, we obtain γ=(69[subscript -16]+17)° modulo 180°. The total uncertainty is dominated by the statistical component, with the experimental and amplitude-model systematic uncertainties amounting to ±4°. The corresponding two-standard-deviation region is 41°<γ<102°. This result is inconsistent with γ=0 with a significance of 5.9 standard deviations.
Date issued
2013-03
URI
http://hdl.handle.net/1721.1/80882
Department
Massachusetts Institute of Technology. Laboratory for Nuclear Science
Journal
Physical Review D
Publisher
American Physical Society
Citation
Lees, J. P., V. Poireau, V. Tisserand, E. Grauges, A. Palano, G. Eigen, B. Stugu, et al. “Observation of direct CP violation in the measurement of the Cabibbo-Kobayashi-Maskawa angle γ with B^{±}→D^{(*)}K^{(*)±} decays.” Physical Review D 87, no. 5 (March 2013). © 2013 American Physical Society
Version: Final published version
ISSN
1550-7998
1550-2368

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