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The European Physical Journal C

, Volume 58, Issue 1, pp 9–15 | Cite as

DIS and the effects of fluctuations: a momentum space analysis

  • E. Basso
  • M. B. Gay Ducati
  • E. G. de Oliveira
  • J. T. de Santana AmaralEmail author
Regular Article - Theoretical Physics

Abstract

Among the dipole models of deep inelastic scattering at small values of the Bjorken variable x, one has been recently proposed which relates the virtual photon–proton cross section to the dipole–proton forward scattering amplitude in momentum space. The latter is parametrized by an expression which interpolates between its behavior at saturation and the travelling wave, ultraviolet, amplitudes predicted by perturbative QCD from the Balitsky–Kovchegov equation. Inspired by recent developments in coordinate space, we use this model to parametrize the structure function of the proton and confront it with HERA data on ep deep inelastic scattering. Both event-by-event and physical amplitudes are considered, the latter being used to investigate the effect of gluon number fluctuations, beyond the mean-field approximation. We conclude that fluctuations are not present in DIS at HERA energies.

Keywords

Deep Inelastic Scattering ZEUS Collaboration BFKL Equation HERA Data Saturation Scale 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag / Società Italiana di Fisica 2008

Authors and Affiliations

  • E. Basso
    • 1
  • M. B. Gay Ducati
    • 1
  • E. G. de Oliveira
    • 1
  • J. T. de Santana Amaral
    • 1
    Email author
  1. 1.Instituto de FísicaUniversidade Federal do Rio Grande do SulPorto AlegreBrazil

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