Nonpartonic effects in pion electroproduction in the HERMES kinematical region

Abstract

The presentation is concerned with higher twist corrections of nonpartonic origin to semi-inclusive observables in the kinematical region relevant for the HERMES experiment. We demonstrate a strong impact of the VDM-like interaction and the exclusive production of ρ meson on the extraction of the d̄ − ū asymmetry from charged pion DIS multiplicities. We also show that it is the exclusive-ρ channel which accounts for the experimentally observed effect of the excess of charged over neutral pions produced at large z.

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Cite this paper

@inproceedings{Uleshchenko2008NonpartonicEI, title={Nonpartonic effects in pion electroproduction in the HERMES kinematical region}, author={V. Uleshchenko and Antoni Szczurek}, year={2008} }