Quark initial state interaction in deep inelastic scattering and the Drell-Yan process

Journal Article · Tue Feb 01 04:00:00 EST 2005 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PhysRevD.71.034009· OSTI ID:20705927

Linnyk, O; Leupold, S; Mosel, U ^[1]

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1. Institut fuer Theoretische Physik, Universitaet Giessen (Germany)

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{yields}eX scattering (DIS) and the Drell-Yan process (pp{yields}llX) 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 {approx_equal}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-k{sub T} approach.

• OSTI ID: 20705927
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 3 Vol. 71; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BREIT-WIGNER FORMULA
DEEP INELASTIC SCATTERING
DRELL MODEL
FACTORIZATION
MEV RANGE
NUCLEONS
PARTICLE WIDTHS
PARTONS
QUANTUM CHROMODYNAMICS
QUARKS
SPECTRAL FUNCTIONS