First measurement of ADS parameters using B- -> D0K- decays in hadron collisions

Details First measurement of ADS parameters using B- -> D0K- decays in hadron collisions First measurement of ADS parameters using B- -> D0K- decays in hadron collisions

2011-06-20

arxiv.org/abs/1106.3844v2

Physics

High Energy Physics

High Energy Physics - Experiment

6 pages, 8 figures; Proceedings of BEAUTY 2011, 13th International Conference on B-Physics at Hadron Machines, April 4th-8th 2

Scientific paper

Measurements of branching fractions and CP-asymmetries of B^{-} \rightarrow D^{0}K^{-} modes allow a theoretically-clean extraction of the CKM angle \gamma. The method proposed by Atwood, Dunietz and Soni (ADS) makes use of a decay chain where color and Cabibbo suppression interfere, which produces large CP-violating asymmetries. The CDF experiment reports the first measurement at a hadron collider of branching fractions and CP-asymmetries of suppressed B^{-} \rightarrow D^{0}h^{-} signals, where h is \pi or K. Using 5.0 fb^{-1} of data we found a combined significance exceeding 5\sigma and we determined the ADS parameters with accuracy comparable with B-factories.

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