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28 March 2024
 
  » arxiv » hep-ph/0412138

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Quark Initial State Interaction in Deep Inelastic Scattering and the Drell-Yan process
O. Linnyk ; S. Leupold ; U. Mosel ;
Date 10 Dec 2004
Journal Phys.Rev. D71 (2005) 034009
Subject hep-ph nucl-th
AbstractWe pursue a phenomenological study of higher twist effects in high energy processes by taking into account the off-shellness (virtuality) of partons bound in the nucleon. The effect of parton off-shellness in deep inelastic ep->eX scattering and the Drell-Yan process (pp->l+ l- X) is examined. Assuming factorization and a single-parameter Breit-Wigner form for the parton spectral function, we develop a model to calculate the corresponding off-shell cross sections. Allowing for a finite parton width of the order of 100 MeV, we reproduce the data of both DIS and the triple differential Drell-Yan cross section without an additional K-factor. The results are compared to those from perturbative QCD and the intrinsic-kT approach.
Source arXiv, hep-ph/0412138
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