Perturbative QCD Analysis of Local Duality in a fixed W^2 Framework

Physics – High Energy Physics – High Energy Physics - Phenomenology

Scientific paper

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RevTex4, 8 pages, 3 figures

Scientific paper

10.1103/PhysRevLett.89.162001

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.

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