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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 alpha(s)(M-Z) 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 alpha(s)(M-Z) and the gluon and quark densities yields a value for alpha(s)(M-Z) 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 Q(2).
This is a Submitted version This version's date is: 1/1/2003 This item is not peer reviewed
https://repository.royalholloway.ac.uk/items/4c97a6d6-7349-d582-6980-58a8d194b5e3/2/
Deposited by Research Information System (atira) on 30-May-2012 in Royal Holloway Research Online.Last modified on 30-May-2012