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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 | Abstract: | We 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 | Services: | Forum | Review | PDF | Favorites |
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