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Parton-Hadron Duality in Unpolarised and Polarised Structure Functions

N. Bianchi·A. Fantoni·S. Liuti
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Abstract

We study the phenomenon of parton-hadron duality in both polarised and unpolarised electron proton scattering using the HERMES and the Jefferson Lab data, respectively. In both cases we extend a systematic perturbative QCD based analysis to the integrals of the structure functions in the resonance region. After subtracting target mass corrections and large x resummation effects, we extract the remaining power corrections up to order 1/Q^2. We find a sizeable suppression of these terms with respect to analyses using deep inelastic scattering data. The suppression appears consistently in both polarised and unpolarised data, except for the low Q^2 polarised data, where a large negative higher twist contribution remains. Possible scenarios generating this behavior are discussed.

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N. Bianchi, A. Fantoni, S. Liuti. 2003-08-05. Parton-Hadron Duality in Unpolarised and Polarised Structure Functions. https://doi.org/10.1103/physrevd.69.014505

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