literature
Literature
Authors
Jobs
Seminars
Conferences
DataBETA

Measurement of the relative branching fractions of Bˉ→\bar{B} \to D/D*/D** ℓ−νˉ\ell^{-} \bar{\nu}( ℓ)\ell^{)} decays in events with a fully reconstructed BB meson

Collaboration
Mar, 2007
8 pages
Published in:
  • Phys.Rev.D 76 (2007) 051101
e-Print:
DOI:
Report number:
  • SLAC-PUB-12393,
  • BABAR-PUB-07-012
Experiments:
View in:
reference search19 citations

Citations per year

2006200920122015201802468
Abstract:
We determine the relative branching fractions of semileptonic B decays to charmed final states. The measurement is performed on the recoil from a fully reconstructed B meson in a sample of 362 million BBbar pairs collected at the Upsilon(4S) resonance with the BaBar detector. A simultaneous fit to a set of discriminating variables is performed on a sample of Bbar --> D X l^- anti-nu_l decays to determine the contributions from the different channels. We measure Gamma(B- --> D l^- anti-nu_l)/Gamma (B- --> D X l^- anti-nu_l)= 0.227 +/- 0.014 +/- 0.016, Gamma(B- --> D* l^- anti-nu_l)/Gamma (B- --> D X l^- anti-nu_l)= 0.582 +/- 0.018 +/- 0.030 and Gamma(B- --> D** l^- anti-nu_l)/Gamma (B- --> D X l^- anti-nu_l)= 0.191 +/- 0.013 +/- 0.019 for the charged B sample, and Gamma(B0bar --> D l^- anti-nu_l)/Gamma (B0bar --> D X l^- anti-nu_l)= 0.215 +/- 0.016 +/- 0.013, Gamma(B0bar --> D* l^- anti-nu_l)/Gamma (B0bar --> D X l^- anti-nu_l)= 0.537 +/- 0.031 +/- 0.036 and Gamma(B0bar --> D** l^- anti-nu_l)/Gamma (B0bar --> D X l^- anti-nu_l)= 0.248 +/- 0.032 +/- 0.030 for the neutral B sample, where uncertainties are statistical and systematic, respectively.
Note:
  • 8 pages, 1 postscript figure, submitted to PRD-RC Report-no: BABAR-PUB-07/012, SLAC-PUB-12393
  • 13.20.He
  • 12.38.Qk
  • 14.40.Nd
  • electron positron: colliding beams
  • electron positron: annihilation
  • Upsilon(10570): electroproduction
  • B: pair production
  • anti-B: semileptonic decay
  • charmed meson: decay modes
  • D