Measurement of the BD()πlνl\overline{B} \to D^{(*)}\pi l\overline{\nu}_l Branching Fraction

Collaboration
Dec, 1999

Citations per year

20002003200620092010012345
Abstract: (Elsevier)
A study of bb semileptonic decays into DD, Dπ±D\pi^{\pm} and Dπ±D^*\pi^{\pm} final states is presented.The D0D^0, D+D^+ and D+D^{*+} mesons are exclusively reconstructed in ZZ decay data recorded from 1992 to 1995in the DELPHI experiment at LEP. The overall branching fractions are measured to be: BR(b>D0νˉX)=(7.04+/0.34(stat)+/0.36(syst.exp)+/0.17(BRD))%,BR(b -> D^0 \ell^- \bar{\nu}_{\ell} X) = (7.04 +/- 0.34 (stat) +/- 0.36 (syst.exp) +/- 0.17 (BR_D))\%, BR(b>D+νˉX)=(2.72+/0.19(stat)+/0.16(syst.exp)+/0.18(BRD))%BR(b -> D^+ \ell^- \bar{\nu}_{\ell} X) = (2.72 +/- 0.19 (stat) +/- 0.16 (syst.exp) +/- 0.18 (BR_D))\%, BR(b>D+νˉX)=(2.75+/0.17(stat)+/0.13(syst.exp)+/0.09(BRD))%BR(b -> D^{*+} \ell^- \bar{\nu}_{\ell} X) = (2.75 +/- 0.17 (stat) +/- 0.13 (syst.exp) +/- 0.09 (BR_D))\% where the D0D^0 and D+D^+ results include also contributions from D0D^{*0} and D+D^{*+} decays.
Note:
  • 25 pages, 6 figures Report-no: CERN-EP/99-174 Journal-ref: Phys. Lett. B 475 (2000) 407-428
  • electron positron: colliding beams
  • electron positron: annihilation
  • Z0: electroproduction
  • bottom: pair production
  • bottom: semileptonic decay
  • anti-B: semileptonic decay
  • D0
  • D+
  • D*(2010)
  • pi