Authors

S. E. Csorna
G. Bonvicini
D. Cinabro
M. Dubrovin
A. Bornheim
E. Lipeles
S. P. Pappas
A. Shapiro
A. J. Weinstein
R. A. Briere
G. P. Chen
T. Ferguson
G. Tatishvili
H. Vogel
M. E. Watkins
N. E. Adam
J. P. Alexander
K. Berkelman
V. Boisvert
D. G. Cassel
J. E. Duboscq
K. M. Ecklund
R. Ehrlich
R. S. Galik
L. Gibbons
B. Gittelman
S. W. Gray
D. L. Hartill
B. K. Heltsley
L. Hsu
C. D. Jones
J. Kandaswamy
D. L. Kreinick
V. E. Kuznetsov
A. Magerkurth
H. Mahlke-Kruger
T. O. Meyer
J. R. Patterson
T. K. Pedlar
D. Peterson
J. Pivarski
D. Riley
A. J. Sadoff
H. Schwarthoff
M. R. Shepherd
W. M. Sun
J. G. Thayer
D. Urner
T. Wilksen
M. Weinberger
S. B. Athar
P. Avery
L. Breva-Newell
V. Potlia
H. Stoeck
J. Yelton
B. I. Eisenstein
G. D. Gollin
I. Karliner
N. Lowrey
P. Naik
C. Sedlack
M. Selen
J. J. Thaler
J. Williams
K. W. Edwards
D. Besson
K. Y. Gao
D. T. Gong
Y. Kubota
S. Z. Li
R. Poling
A. W. Scott
A. Smith
C. J. Stepaniak
J. Urheim
Z. Metreveli
K. K. Seth
A. Tomaradze
P. Zweber
J. Ernst
K. Arms
E. Eckhart
K. K. Gan
C. Gwon
H. Severini
P. Skubic
D. M. Asner
S. A. Dytman
S. Mehrabyan
J. A. Mueller
S. Nam
V. Savinov
G. S. Huang
D. H. Miller
V. Pavlunin
B. Sanghi
E. I. Shibata
I. P. J. Shipsey
G. S. Adams
M. Chasse
J. P. Cummings
I. Danko
J. Napolitano
D. Cronin-Hennessy
C. S. Park
W. Park
J. B. Thayer
E. H. Thorndike
T. E. Coan
Y. S. Gao
F. Liu
R. Stroynowski
M. Artuso
C. Boulahouache
S. Blusk
J. Butt
E. Dambasuren
O. Dorjkhaidav
J. Haynes
N. Menaa
R. Mountain
H. Muramatsu
R. Nandakumar
R. Redjimi
R. Sia
T. Skwarnicki
S. Stone
J. C. Wang
K. Zhang
A. H. Mahmood

Published in:

Physical Review D 70,3 (2004) 032002;

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 Y(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)lnu processes with X-c=D, D-*, D-**, and nonresonant X-c, and the process B-->X(u)lnu. 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 =(0.456+/-0.014+/-0.045+/-0.109) GeV2/c(4) with a minimum lepton energy of 1.0 GeV and =(0.293+/-0.012+/-0.033+/-0.048) GeV2/c(4) 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(2) moment as a function of the minimum lepton energy requirement are compared to the predictions.

Keywords

lund monte-carlo;; form-factors;; radiative-corrections;; jet fragmentation;; dispersive bounds;; e+e-physics;; qcd;; detector;; update;; model

Date of this Version

January 2004

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