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We report the determination of the Cabibbo-Kobayashi-Maskawa CP-violatingangle gamma through the combination of various measurements involving B^{+-}--> D K^{+-}, B^{+-} --> D^{*} K^{+-}, and B^{+-} --> D K^{*+-} decaysperformed by the BaBar experiment at the PEP-II e^{+}e^{-} collider at SLACNational Accelerator Laboratory. Using up to 474 million B\bar{B} pairs, weobtain gamma = (69 ^{+17}_{-16})^\circ (modulo 180^\circ). The totaluncertainty is dominated by the statistical component, with the experimentaland amplitude-model systematic uncertainties amounting to +-4^\circ. Thecorresponding two-standard-deviation region is 41^\circ < gamma < 102^\circ.This result is inconsistent with gamma = 0 with a significance of 5.9 standarddeviations.

Observation of direct CP violation in the measurement of the Cabibbo-Kobayashi-Maskawa angle gamma with B+- --> D(*)K(*)+- decays

Observation of direct CP violation in the measurement of the Cabibbo-Kobayashi-Maskawa angle gamma with B+- --> D()K()+- decays