Absence of shadowing in Drell-Yan production at finite transverse momentum exchange

Abstract

Within a perturbative scalar QED model recently considered by Brodsky et al., we study how leading-twist Coulomb rescatterings affect the Drell-Yan cross section at small x = x_{target}, and compare to the case of deep inelastic scattering at small x_{B}. We show that in the range where the transverse momentum transferred to the target is large compared to its minimal value $\sim \morder{x}$, Coulomb rescatterings affect the DIS cross section but not the Drell-Yan production rate. This illustrates that the leading-twist parton distribution functions become non-universal when cross sections which are differential in target-related particles are considered.

22 pages, latex, feynmf

References in corpus (1)

• Parton Distributions in Light-Cone Gauge: Where Are the Final-State Interactions?

Cited by in corpus (7)

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• Low-mass lepton pair production at large transverse momentum
• Initial and Final State Interaction Effects in Small-x Quark Distributions
• Q^2 dependence of azimuthal asymmetries in semi-inclusive deep inelastic scattering and in Drell-Yan
• Non-universality of transverse Coulomb exchange at small x