Search:
Computing and Library Services - delivering an inspiring information environment

Measurement of the B[over ¯]^{0}→D^{*+}ℓ^{-}ν[over ¯]_{ℓ} decay rate and |V_{cb}|

Aubert, B. et al. (2005) Measurement of the B[over ¯]^{0}→D^{*+}ℓ^{-}ν[over ¯]_{ℓ} decay rate and |V_{cb}|. Physical Review D, 71 (5). 051502. ISSN 1550-7998

Metadata only available from this repository.

Abstract

We present a measurement of the Cabibbo-Kobayashi-Maskawa matrix element |Vcb| based on a sample of about 53 700 B̅ 0→D*+ℓ-ν̅ ℓ decays observed by the BABAR detector. We obtain the branching fraction averaged over ℓ=e,μ, B(B̅ 0→D*+ℓ-ν̅ ℓ)=(4.90±0.07(stat.)-0.35+0.36(syst.))%. We measure the differential decay rate as a function of w, the relativistic boost γ of the D*+ in the B̅ 0 rest frame. By extrapolating dΓ/dw to the kinematic limit w→1, we extract the product of |Vcb| and the axial form factor A1(w=1). We combine this measurement with a lattice QCD calculation of A1(w=1) to determine |Vcb|=(38.7±0.3(stat.)±1.7(syst.)-1.3+1.5(theory))×10-3.

Item Type: Article
Subjects: Q Science > QC Physics
Schools: School of Applied Sciences
Related URLs:
Depositing User: Sharon Beastall
Date Deposited: 30 Jun 2011 13:35
Last Modified: 30 Jun 2011 13:35
URI: http://eprints.hud.ac.uk/id/eprint/10857

Item control for Repository Staff only:

View Item

University of Huddersfield, Queensgate, Huddersfield, HD1 3DH Copyright and Disclaimer All rights reserved ©