Improved Measurement of |Vcb| using B --> D* l nu Decays

Abstract

We determine the weak coupling |Vcb| between the b and c quarks using a sample of 3 million BB-bar events in the CLEO detector at the Cornell Electron Storage Ring. We determine the yield of reconstructed B --> D* l nu decays as a function of w, the boost of the D* in the B rest frame, and from this we obtain the differential decay rate dGamma/dw. By extrapolating dGamma/dw to w=1, the kinematic end-point at which the D* is at rest relative to the B, we extract the product |Vcb|F(1), where F(1) is the form factor at w=1. We find |Vcb|F(1) = 0.0431 +- 0.0013 (stat.) +- 0.0018 (syst.).

10 pages postscript, also available through http://w4.lns.cornell.edu/public/CLNS, Submitted to PRL

References in corpus (3)

• Hadronic Mass Moments in Inclusive Semileptonic B Meson Decays
• Measurement of Br(Bbar -> D+l-nubar) and Determination of |Vcb|
• Measurement of V_{cb} from the decay process \bar{B^0} -> D^{*+} \ell^- \barν

Cited by in corpus (16)

• $B\to D^{(\ast )}$ form factors in perturbative QCD
• Measurement of the form factors of the decay B0 -> D*- ell+ nu and determination of the CKM matrix element |Vcb|
• Measurement of the Lambda_b^0 Decay Form Factor
• Determination of the B-bar --> D* l nu-bar Decay Width and |V_cb|
• Quenched lattice calculation of the vector channel B --> D* l nu decay rate
• B Meson Decays
• Measurement of the B0bar --> D*+ l- nubar_l Decay Rate and |Vcb|
• Chiral 1/M^2 corrections to B^(*) -> D^(*) at Zero Recoil in Quenched Chiral Perturbation Theory
• B => D(*) transitions in a quark model
• Search for B->pbar e nuebar X Decay using a Partial Reconstruction Method
• Semileptonic B decays into even parity charmed mesons
• Estimate of B(K -> pi nu nubar) from Standard Model fits to lambda_t
• Chiral Perturbation Theory on the Lattice and its Applications
• Remark on the Theoretical Uncertainty in $B^0$-${\bar{B}}^0$ Mixing
• Selected Theoretical Issues in B-meson Physics: CKM matrix and Semileptonic Decays
• Measurements of |Vub| and |Vcb| from CLEO