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First observation of the decays Bˉ0→D+K−π+π−\bar{B}^0 \to D^{+} K^{-} \pi^{+} \pi^{-} and B−→D0K−π+π−B^{-} \to D^0 K^{-} \pi^{+} \pi^{-}

Collaboration
Jan, 2012
9 pages
Published in:
  • Phys.Rev.Lett. 108 (2012) 161801
e-Print:
DOI:
Report number:
  • LHCB-PAPER-2011-040,
  • CERN-EP-PH-2011-229,
  • CERN-PH-EP-2011-229
Experiments:
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Abstract: (arXiv)
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.
Note:
  • 9 pages, 2 figures
  • 12.15.Hh
  • 13.25.Hw
  • p p: interaction
  • bottom: pair production
  • anti-B0: hadronic decay
  • B-: hadronic decay
  • mass spectrum
  • amplitude analysis
  • anti-B0: branching ratio: measured
  • B-: branching ratio: measured