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Perturbative QCD Analysis of Local Duality in a FixedW2Framework
2002
Physical Review Letters
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We study the global Q^2 dependence of large x, F_2 nucleon structure function data, with the aim of providing a perturbative-QCD based, quantitative analysis of parton-hadron duality. As opposed to previous analyses at fixed x, we use a framework in fixed W^2. We uncover a breakdown of the twist-4 approximation with a renormalon type improvement at O(1/Q^4) which, by affecting the initial evolution of parton distributions, will have consequences for pQCD analyses also at large x and very large Q^2.
doi:10.1103/physrevlett.89.162001
pmid:12398715
fatcat:qizcyb7g25exxouz5a5n36jiee