Measurement of the relative branching fractions of B¯→D/D*/D**l-ν¯l decays in events with a fully reconstructed B meson
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 362×106 BB¯ pairs collected at the Υ(4S) resonance with the BABAR detector. A simultaneous fit to a set of discriminating variables is performed on a sample of B¯→DXℓ-ν¯ℓ decays to determine the contributions from the different channels. We measure Γ(B-→Dℓ-ν¯ℓ)/Γ(B-→DXℓ-ν¯ℓ)=0.227±0.014±0.016, Γ(B-→D*ℓ-ν¯ℓ)/Γ(B-→DXℓ-ν¯ℓ)=0.582±0.018±0.030, and Γ(B-→D**ℓ-ν¯ℓ)/Γ(B-→DXℓ-ν¯ℓ)=0.191±0.013±0.019 for the charged B sample, and Γ(B0¯→Dℓ-ν¯ℓ)/Γ(B0¯→DXℓ-ν¯ℓ)=0.215±0.016±0.013, Γ(B0¯→D*ℓ-ν¯ℓ)/Γ(B0¯→DXℓ-ν¯ℓ)=0.537±0.031±0.036, and Γ(B0¯→D**ℓ-ν¯ℓ)/Γ(B0¯→DXℓ-ν¯ℓ)=0.248±0.032±0.030 for the neutral B sample, where uncertainties are statistical and systematic, respectively.
- Publication:
-
Physical Review D
- Pub Date:
- September 2007
- DOI:
- 10.1103/PhysRevD.76.051101
- arXiv:
- arXiv:hep-ex/0703027
- Bibcode:
- 2007PhRvD..76e1101A
- Keywords:
-
- 13.20.He;
- 12.38.Qk;
- 14.40.Nd;
- Decays of bottom mesons;
- Experimental tests;
- Bottom mesons;
- High Energy Physics - Experiment
- E-Print:
- 8 pages, 1 postscript figure, submitted to PRD-RC