Moments of the B meson inclusive semileptonic decay rate using neutrino reconstruction

S. E. Csorna et al. (CLEO Collaboration)
Phys. Rev. D 70, 032002 – Published 17 August 2004
PDFExport Citation

Abstract

We present a measurement of the composition of B meson inclusive semileptonic decays using 9.4 fb1 of e+e data taken with the CLEO detector at the Υ(4S) resonance. In addition to measuring the charged lepton kinematics, the neutrino four-vector is inferred using the hermiticity of the detector. We perform a maximum likelihood fit over the full three-dimensional differential decay distribution for the fractional contributions from the BXclν processes with Xc=D, D*, D**, and nonresonant Xc, and the process BXulν. From the fit results we extract the first and second moments of the MX2 and q2 distributions with minimum lepton-energy requirements of 1.0 GeV and 1.5 GeV. We find MX2MD2=(0.456±0.014±0.045±0.109)GeV2/c4 with a minimum lepton energy of 1.0 GeV and MX2MD2=(0.293±0.012±0.033±0.048)GeV2/c4 with minimum lepton energy of 1.5 GeV. The uncertainties are from statistics, detector systematic effects, and model dependence, respectively. As a test of the HQET and OPE calculations, the results for the MX2 moment as a function of the minimum lepton energy requirement are compared to the predictions.

  • Received 1 April 2004

DOI:https://doi.org/10.1103/PhysRevD.70.032002

©2004 American Physical Society

Authors & Affiliations

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 70, Iss. 3 — 1 August 2004

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review D

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×