Unraveling Violations of Parton-Hadron Duality in ep Scattering

Details Unraveling Violations of Parton-Hadron Duality in ep Scattering Unraveling Violations of Parton-Hadron Duality in ep Scattering

2002-05-27

arxiv.org/abs/hep-ph/0205298v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, Talk presented at the 37th Rencontres de Moriond, QCD and Hadronic Interactions, Les Arcs 1800 (France), March 16-23

Scientific paper

Recent studies of the Q^2 dependence of ep scattering in the large x region and in the Q^2 range: 1 < Q^2 2.4 GeV^2 At lower values of W^2, duality is found to be significantly violated by an amount that cannot be parametrized in terms of the first few terms of a series of power corrections. We present a dynamical model that explains the Q^2 dependence of the data: at low W^2, non-partonic components given by color neutral clusters dominate the cross section and the Q^2 dependence is governed by their mass spectrum, predicted within the preconfiment property of Q CD; at large W^2 the structure function is determined by a convolution of the cluster mass spectrum with the parton distributions.

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