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Paper detail

Quark Initial State Interaction in Deep Inelastic Scattering and the Drell-Yan process

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.

preprint2005arXivOpen access
O. LinnykS. LeupoldU. Mosel
hep-phnucl-th
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O. LinnykS. LeupoldU. Mosel

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