2002/07/03 by V. Uleshchenko, A. Szczurek
Physics and Astronomy · #hep-ph
published as Acta Phys.Polon. B33 (2002) 3299-3304 · A talk presented at DIS2002, 30 April - 4 May 2002, Cracow
arxiv created 2002/07/03 · arxiv updated 2009/11/30
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 ρ0 meson on the extraction of the d - u asymmetry from charged pion DIS multiplicities. We also show that it is the exclusive-ρ0 channel which accounts for the experimentally observed effect of the excess of charged over neutral pions produced at large z.