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29 March 2024
 
  » arxiv » hep-ph/0310029

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CJK- Improved LO Parton Distributions in the Real Photon and Their Experimental Uncertainties
F.Cornet ; P.Jankowski ; M.Krawczyk ;
Date 2 Oct 2003
Subject hep-ph
AffiliationGranada U.), P.Jankowski (Warsaw U.), M.Krawczyk (Warsaw U
AbstractA new analysis of the radiatively generated, LO quark (u,d,s,c,b) and gluon densities in the real, unpolarized photon, improved in respect to our paper [1], is presented. We perform four new global fits to the experimental data for F2^gamma, two using a standard FFNS approach and two based on ACOT(chi) scheme [2], leading to the FFNS(CJK) and CJK models. We also present the analysis of the uncertainties of the new CJK 2 parton distributions due to the experimental errors, the very first such analysis performed for the photon. This analysis is based on the Hessian method, for a comparison for chosen cross-sections we use also the Lagrange method.
Source arXiv, hep-ph/0310029
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