Moments of the B Meson Inclusive Semileptonic Decay Rate using Neutrino Reconstruction

Abstract

We present a measurement of the composition of B meson inclusive semileptonic decays using 9.4 fb^-1 of e^+e^- data taken with the CLEO detector at the Upsilon(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 B -> X_c l nu processes with X_c = D, D*, D**, and nonresonant X_c, and the process B -> X_u l nu. From the fit results we extract the first and second moments of the M_X^2 and q^2 distributions with minimum lepton-energy requirements of 1.0 GeV and 1.5 GeV. We find <M_X^2 - M_D[Bar]^2> = 0.456 +- 0.014 +- 0.045 +- 0.109 (GeV/c^2)^2 with a minimum lepton energy of 1.0 GeV and <M_X^2 - M_D[Bar]^2> = 0.293 +- 0.012 +- 0.033 +- 0.048 (GeV/c^2)^2 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 M^X_c moment as a function of the minimum lepton energy requirement are compared to the predictions.

26 pages postscript, als available through http://w4.lns.cornell.edu/public/CLNS/, Submitted to PRD (back-to-back with following preprint hep-ex/0403053)

References in corpus (1)

• Measurement of the B-Meson Inclusive Semileptonic Branching Fraction and Electron-Energy Moments

Cited by in corpus (25)

• Averages of $b$-hadron, $c$-hadron, and $\tau$-lepton properties as of summer 2016
• Averages of $b$-hadron, $c$-hadron, and $\tau$-lepton properties as of 2018
• Averages of $b$-hadron, $c$-hadron, and $\tau$-lepton properties as of 2021
• Flavor Physics in the Quark Sector
• Global analysis of inclusive B decays
• Taming the higher power corrections in semileptonic B decays
• Fit to Moments of Inclusive B->Xc lv and B-> Xs gamma Decay Distributions using Heavy Quark Expansions in the Kinetic Scheme
• Inclusive semileptonic fits, heavy quark masses, and V_cb
• O(α_s^2) corrections to semileptonic decay b \to c l \bar ν_l
• Challenges in Semileptonic B Decays
• Determination of heavy quark non-perturbative parameters from spectral moments in semileptonic B decays
• Third order corrections to the semi-leptonic \boldmath{$b\to c$} and the muon decays
• Moments of the Hadronic Invariant Mass Spectrum in B --> X_c l nu Decays at Belle
• Kinetic corrections to B -> X_c l nu at one loop
• Measurement and interpretation of moments in inclusive semileptonic decays Bbar --> X_c l- nubar
• Measurement of the B-Meson Inclusive Semileptonic Branching Fraction and Electron-Energy Moments
• The Heavy Quark Expansion for Inclusive Semileptonic Charm Decays Revisited
• A Study of Exclusive Charmless Semileptonic B Decays and Extraction of |V_{ub}| at CLEO
• The Average Kinetic Energy of the Heavy Quark in ${\Lambda }_b$ in the Bethe-Salpeter Equation Approach
• The forward-backward asymmetry and differences of partial moments in inclusive semileptonic B decays
• Semileptonic and radiative B decays circa 2005
• Experimental Status of the CKM Matrix
• Additional Information on Heavy Quark Parameters from Charged Lepton Forward-Backward Asymmetry
• Inclusive semileptonic B decays and |Vcb|
• Inclusive determinations of Vub and Vcb