First observation of the decays $\bar{B}^0 \to D^{+} K^{-} \pi^{+} \pi^{-}$ and $B^{-} \to D^0 K^{-} \pi^{+} \pi^{-}$

Авторы: LHCb Collaboration (R A.(., Образцов В.Ф.
Журнал: Physical Review Letters
Том: 106
Год издания: 2012
Издательство: American Physical Society
Местоположение издательства: United States
DOI: 10.1103/PhysRevLett.108.161801
Аннотация: First observations of the Cabibbo suppressed decays B0bar -->D+ K- pi+ pi- and B- --> D0 K- pi+ pi- are reported using 35 pb^{-1} of data collected with the LHCb detector. Their branching fractions are measured with respect to the corresponding Cabibbo favored decays, from which we obtain B(B0bar --> D+ K- pi+ pi-)/B(B0bar --> D+ pi- pi+ pi-)=(5.9\pm1.1\pm0.5) x 10^{-2} and B(B- --> D0 K- pi+ pi-)/B(B- --> D0 pi- pi+ pi-)=(9.4\pm1.3\pm0.9) x 10^{-2}, where the uncertainties are statistical and systematic, respectively. The B- --> D0 K- pi+ pi- decay is particularly interesting, as it can be used in a similar way to B- --> D0 K- to measure the CKM phase gamma.
Добавил в систему: Образцов Владимир Федорович

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