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arXiv · hep-ph/9908473

Deep inelastic Scattering, QCD, and generalised vector dominance

G. Cvetic·D. Schildknecht·A. Shoshi
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Abstract

We provide a formulation of generalised vector dominance (GVD) for low-x deep-inelastic scattering that explicitly incorporates the $γ^{\ast} \to q{\bar q}$ transition and a QCD-inspired ansatz for the $(q{\bar q})p$ forward-scattering amplitude. The destructive interference originally introduced in off-diagonal GVD is recovered in the present formulation and traced back to the generic structure of two-gluon-exchange as incorporated into the notion of colour transparency. Asymptotically, the transverse photoabsorption cross section behaves as (ln Q^2)/Q^2, implying a logarithmic violation of scaling for F_2, while the longitudinal-to-transverse ratio decreases as 1/ln Q^2.

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G. Cvetic, D. Schildknecht, A. Shoshi. 1999-08-26. Deep inelastic Scattering, QCD, and generalised vector dominance. https://doi.org/10.1007/s100520000301

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