Measurement of (→Dℓ) and determination of |V|

2001/11/30 by Belle Collaboration, K. Abe, R. Abe +96 · 3 citations
Computer Science · Physics and Astronomy · #Computational Physics and Python Applications #Neutrino Physics Research #Particle physics theoretical and experimental studies #hep-ex

paper · pdf · doi:10.1016/s0370-2693(01)01483-6

published as Phys.Lett.B526:258-268,2002 · 21pages, 5 figures, elsart.cls, to be published in PLB. In this version, the form factor comparison between B->Dlnu and D*lnu is included

arxiv created 2001/12/19 · openalex publication_date 2002/02/01 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

We present a measurement of the branching fraction for the semileptonic B decay Bbar -> D+l-nubar, where l- can be either an electron or a muon. We find Gamma(Bbar -> D+l-nubar)= (13.79+/-0.76+/-2.51) ns^-1, and the resulting branching fraction Br(Bbar -> D+l-nubar)= (2.13 +/- 0.12 +/- 0.39)%, where the first error is statistical and the second systematic. We also investigate the Bbar -> D+l-nubar form factor and the implications of the result for |Vcb|. From a fit to the differential decay distribution we obtain the rate normalization |Vcb|F_D(1)= (4.11+/-0.44+/-0.52)x10^-2. Using a theoretical calculation of F_D(1), the Cabibbo-Kobayashi-Maskawa matrix element |Vcb|=(4.19+/-0.45+/-0.53+/-0.30)x10^-2 is obtained, where the last error comes from the theoretical uncertainty of F_D(1). The results are based on a data sample of 10.2 fb^-1 recorded at the Upsilon(4S) resonance with the Belle detector at the KEKB e+e- collider.

Citations

• CP-Violation in the Renormalizable Theory of Weak Interaction

Cited by

• Analysis of semileptonicBdecays in the relativistic quark model
• Study of the leptonic decays of pseudoscalarB,Dand vectorB*,D*mesons and of the semileptonicB→DandB→D*decays
• Measurement of|Vcb|and the Form-Factor Slope inB¯→Dℓ−ν¯ℓDecays in Events Tagged by a Fully ReconstructedBMeson