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Nonpartonic effects in pion electroproduction in the HERMES kinematical region | | V. Uleshchenko
; A. Szczurek
; | | Date: |
3 Jul 2002 | | Journal: | Acta Phys.Polon. B33 (2002) 3299-3304 | | Subject: | hep-ph | | 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 $
ho^0$ meson on the extraction of the $ar d - ar u$ asymmetry from charged pion DIS multiplicities. We also show that it is the exclusive-$
ho^0$ channel which accounts for the experimentally observed effect of the excess of charged over neutral pions produced at large $z$. | | Source: | arXiv, hep-ph/0207049 | | Services: | Forum | Review | PDF | Favorites | |
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