Measurement of the Branching Fractions of Bmacr →D**ℓ-ν¯ℓ Decays in Events Tagged by a Fully Reconstructed B Meson
Abstract
We report a measurement of the branching fractions of Bmacr →D**ℓ-ν¯ℓ decays based on 417fb-1 of data collected at the Υ(4S) resonance with the BABAR detector at the PEP-II e+e- storage rings. Events are selected by fully reconstructing one of the B mesons in a hadronic decay mode. A fit to the invariant mass differences m(D(*)π)-m(D(*)) is performed to extract the signal yields of the different D** states. We observe the Bmacr →D**ℓ-ν¯ℓ decay modes corresponding to the four D** states predicted by heavy quark symmetry with a significance greater than 5 standard deviations including systematic uncertainties.
- Publication:
-
Physical Review Letters
- Pub Date:
- December 2008
- DOI:
- 10.1103/PhysRevLett.101.261802
- arXiv:
- arXiv:0808.0528
- Bibcode:
- 2008PhRvL.101z1802A
- Keywords:
-
- 13.20.He;
- 12.38.Qk;
- 14.40.Nd;
- Decays of bottom mesons;
- Experimental tests;
- Bottom mesons;
- High Energy Physics - Experiment
- E-Print:
- 7 pages, 1 postscript figure, submitted to Phys. Rev. Lett