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ZEUS Next-to-leading-order QCD Analysis of Data on Deep Inelastic Scattering
Authors
G. Bruni
S. Chekanov
+29 more
L. Cifarelli
F. Cindolo
A. Contin
M. Corradi
S. De Pasquale
P. Giusti
G. Iacobucci
D. Krakauer
H. Labes
D. Lelas
B. Löhr
S. Magill
R. Mankel
A. Margotti
M. Martínez
I. A. Melzer-Pellmann
M. Moritz
B. Musgrave
R. Nania
D. Notz
F. Palmonari
A. Pesci
M. C. Petrucci
A. Polini
J. Repond
G. Cara Romeo
G. Sartorelli
R. Yoshida
A. Zichichi
Publication date
31 January 2003
Publisher
Digital Commons @ Andrews University
Abstract
Next-to-leading-order QCD analyses of the ZEUS data on deep inelastic scattering together with fixed-target data have been performed, from which the gluon and quark densities of the proton and the value of the strong coupling constant (Formula presented) were extracted. The study includes a full treatment of the experimental systematic uncertainties including point-to-point correlations. The resulting uncertainties in the parton density functions are presented. A combined fit for (Formula presented) and the gluon and quark densities yields a value for (Formula presented) in agreement with the world average. The parton density functions derived from ZEUS data alone indicate the importance of HERA data in determining the sea quark and gluon distributions at low x. The limits of applicability of the theoretical formalism have been explored by comparing the fit predictions to ZEUS data at very low (Formula presented) © 2003 The American Physical Society
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Last time updated on 13/04/2021