Deep inelastic Scattering, QCD, and generalised vector dominance

Abstract

We provide a formulation of generalised 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.

36 pages, 9 figures, revtex

Cited by in corpus (25)

• Diffractive Vector Meson Production at HERA: from Soft to Hard QCD
• NLO corrections for the dipole factorization of DIS structure functions at low x
• Model-dependence of the $\gamma Z$ dispersion correction to the parity-violating asymmetry in elastic $ep$ scattering
• Dispersion $\gamma Z$-box correction to the weak charge of the proton
• Constrained gamma-Z interference corrections to parity-violating electron scattering
• Low-x scaling in ${\gamma }^{\ast }p$ total cross sections
• The Color Dipole Picture of low-x DIS: Model-Independent and Model-Dependent Results
• Towards a Nonperturbative Foundation of the Dipole Picture: I. Functional Methods
• Scaling in ${\gamma }^{\ast }p$ total cross sections, saturation and the gluon density
• The Color Dipole Picture and the ratio of R(W, Q) = sigma L/sigma T
• Deep inelastic scattering at low x: Generalized vector dominance and the color dipole picture
• Color Dipole Picture of Deep Inelastic Scattering, Revisited
• Color Dipole picture at Low-x DIS: The Mass Range of Active Photon Fluctuations
• Deep inelastic scattering and "elastic" diffraction
• The total virtual photoabsorption cross section, deeply virtual Compton scattering and vector-meson production
• Hadronic gamma-Z box corrections in M\oller scattering
• Color-Dipole Picture versus Hard Pomeron in Deep Inelastic Scattering
• The color dipole picture of low-x DIS
• Comment on "The New F_L Measurement from HERA and the Dipole Model"
• Two component model for a description of nucleon structure functions in low-x region
• Vector meson dominance and deep inelastic scattering at low and medium Q squared
• The Proton Gluon Distribution from the Color Dipole Picture
• Color dipole cross-section from unifying the color dipole picture and improved saturation models
• A two-component model for ${\gamma }^{\ast }$-p scattering at small Bjorken x
• One-to-One correspondence of soft and hard Pomeron with the CDP of the gluon density at low $x$