literature
Literature
Authors
Jobs
Seminars
Conferences
DataBETA

Observation of Cabibbo suppressed B ---> D(*)K- decays at BELLE

Collaboration
Apr, 2001
12 pages
Published in:
  • Phys.Rev.Lett. 87 (2001) 111801
e-Print:
DOI:
Report number:
  • KEK-PREPRINT-2001-19,
  • BELLE-PREPRINT-2001-4
Experiments:
View in:
pdf
reference search46 citations

Citations per year

2001200720132019202401234567
Abstract: (arXiv)
Cabibbo-suppressed decays B→D(∗)K−B \to D^{(*)} K^- using a 10.4 fb−1^{-1} data sample accumulated at the Υ(4S)\Upsilon(4S) resonance with the Belle detector at the KEKB e+e−e^+ e^- storage ring. The high-momentum particle identification system of Belle is used to isolate signals for B→D0K−B\to D^0 K^-, D+K−D^+K^-, D∗0K−D^{*0}K^- and D∗+K−D^{*+}K^- from the B→D(∗)π−B\to D^{(*)}\pi^- decay processes which have much larger branching fractions. We report ratios of Cabibbo-suppressed to Cabibbo-favored branching fractions of: B(B−→D0K−)/B(B−→D0π−)=0.079±0.009±0.006{\cal B}(B^- \to D^0 K^-)/{\cal B}(B^- \to D^0\pi^-) = 0.079\pm0.009\pm0.006; B(B0ˉ→D+K−)/B(B0ˉ→D+π−)=0.068±0.015±0.007{\cal B}(\bar{B^0} \to D^+ K^-)/{\cal B}(\bar{B^0} \to D^+\pi^-) = 0.068\pm0.015\pm0.007; B(B−→D∗0K−)/B(B−→D∗0π−)=0.078±0.019±0.009{\cal B}(B^-\to D^{*0}K^-)/{\cal B}(B^-\to D^{*0}\pi^-) = 0.078 \pm 0.019 \pm 0.009; and B(Bˉ0→D∗+K−)/B(Bˉ0→D∗+π−)=0.074±0.015±0.006{\cal B}(\bar{B}^0\to D^{*+}K^-)/{\cal B}(\bar{B}^0\to D^{*+}\pi^-)= 0.074 \pm 0.015 \pm 0.006. The first error is statistical and the second is systematic. These are the first reported observations of the B→D+K−B\to D^+K^-, D∗0K−D^{*0}K^- and D∗+K−D^{*+}K^- decay processes.
Note:
  • LaTeX, 12 pages, 2 figures Report-no: KEK Preprint 2001-19, Belle Preprint 2001-4
  • electron positron: colliding beams
  • electron positron: annihilation
  • Upsilon(10570): electroproduction
  • B: pair production
  • B: hadronic decay
  • D*(2010)
  • B: branching ratio
  • BELLE
  • experimental results
  • KEK TRISTAN Stor