Abstract.
We provide a formulation of generalized vector dominance (GVD) for low–x deep-inelastic scattering that explicitly incorporates the \({\gamma}^{\ast} \to q{\bar q}\) 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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Received: 27 August 1999 / Revised version: 19 November 1999 / Published online: 17 February 2000
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Cvetič, G., Schildknecht, D. & Shoshi, A. Deep inelastic scattering, QCD, and generalized vector dominance. Eur. Phys. J. C 13, 301–314 (2000). https://doi.org/10.1007/s100520000301
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DOI: https://doi.org/10.1007/s100520000301