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PUB-04/007 Determination of the Branching Fraction for B -> X_c l nu Decays and of |V_cb| from Hadronic-Mass and Lepton-Energy Moments
Doc Type Journal Papers
Record Created February 2, 2004
SLAC-PUB
SLAC-PUB-10403  No citations
Preprint # hep-ex/0404017
Abstract
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We determine the inclusive B --> X_c l nu branching fraction, 
the CKM matrix element |V_cb|, and other heavy-quark parameters from a simultaneous 
fit to moments of the hadronic-mass and lepton-energy distributions in semileptonic 
B-meson decays, measured as a function of the lower limit on the lepton energy, 
based on data recorded with the BABAR detector. Using Heavy Quark Expansions (HQEs) 
to order 1/m_b^3, we extract  BR(B -->X_c e n) = (10.61 +- 0.16(exp) +- 0.06(HQE))%  
and |V_cb|= (41.4 +- 0.4(exp) +- 0.4(HQE) +- 0.6(theory) x 10^-3. The stated errors 
refer to the experimental, HQE, and additional theoretical uncertainties.

Related Docs
Revisions and Files 1 revised February 2, 2004
File Date
Thumbnails
File Name File Type File Format File Size (Kb) Comments
12-APR-2004 BABAR-PUB-04007.pdf Paper (journal paper or conference submission by BABAR Collaboration) pdf 249.74 uploaded to ICHEP (rnc)
12-APR-2004 BABAR-PUB-04007.ps Paper (journal paper or conference submission by BABAR Collaboration) ps.gz 1,417.44
12-APR-2004 Fig01.eps Figure or plot eps 803.70 Measured moments as function of lepton energy cut compared to HQE fit
12-APR-2004 Fig02.eps Figure or plot eps 703.84 Chi-square ellopses for fit results
12-APR-2004 abstract.txt Abstract txt 0.64
Submitted ToPhysical Review Letters
Date SubmittedApril 12, 2004
Journal Year2004
Journal Volume93
Journal Article/Page Range011803
Categories
  • AWG: Semileptonic