Uncertainties in the Determination of |V_cb|

1995/05/05 by Matthias Neubert, Neubert, Matthias · 2 citations
Chemistry · Physics and Astronomy · #Atomic and Subatomic Physics Research #Radioactive Decay and Measurement Techniques #Radioactive element chemistry and processing #hep-ph

paper · pdf · doi:10.48550/arxiv.hep-ph/9505238

Proceedings of 1995 Moriond Conference on Electroweak Interactions and Unified Theories, 11 pages, 3 figures available as uu-encoded postscript files

arxiv created 1995/05/05 · arxiv updated 2009/11/30

Abstract

I discuss the theoretical uncertainties in the extraction of | V_cb| from semilep\-to\-nic decays of B mesons, taking into account the most recent theoretical developments. The main sources of uncertainty are identified both for the exclusive decay mode B→ D^*ℓ ν and for the inclusive channel B→ X ℓ ν. From an analysis of the available experimental data, I obtain | V_cb|_{\rm excl} = 0.041± 0.003_{\rm exp}± 0.002_{\rm th} from the exclusive mode, and | V_cb|_{\rm incl} = 0.040± 0.001_{\rm exp}± 0.005_{\rm th} from the inclusive mode. I also give a prediction for the slope of the form factor \calF(w) at zero recoil, which is \widehat\varrho²=0.8± 0.3.

Cited by

• Determination of |V_{\rm cb}| using Bayesian analysis of the B → D^*ℓ ν_ℓ semileptonic decay width with four-loop QCD corrections
• Predictive SUSY SO(10) X Delta (48) X U(1) Model for CP Violation, Neutrino Oscillation, Fermion Masses and Mixings with Small tan(beta)

Related

• Theoretical Uncertainties in the Extraction of |V_cb| from B→ D^*ℓ ν Decays near Zero Recoil
• Inclusive |V_cb| and global fit
• Determination of |V_cb| from Inclusive Decays B -> Xc l nu using a Global Fit
• Memo on Extracting |V(cb)| and |V(ub)/V(cb)| from semileptonic B decays
• Some theoretical results on V_ub and V_cb