EPJ

2023 Impact factor 4.2
EPJ C - Particles and Fields
Particles and Fields
Eur. Phys. J. C 13, 301-314
DOI 10.1007/s100520000301

Deep inelastic scattering, QCD,
and generalized vector dominance

G. Cvetic1,2 - D. Schildknecht1 - A. Shoshi1

1 Department of Physics, Bielefeld University, 33501 Bielefeld, Germany
2 Department of Physics, Dortmund University, 44221 Dortmund, Germany

Received: 27 August 1999 / Revised version: 19 November 1999 /
Published online: 17 February 2000 - © Springer-Verlag 2000

Abstract
We provide a formulation of generalized vector dominance (GVD) for low-xdeep-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 F2, while the longitudinal-to-transverse ratio decreases as $1/\ln Q^2$.

Copyright Società Italiana di Fisica, Springer-Verlag 2000

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