Real and virtual photon contributions to inelastic ep scattering

Francesca M. Borzumati, Gerhard A. Schuler

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43 Citations (Scopus)


We investigate direct and resolved photon contributions to hard ep scattering at high energies. Some terms of the direct contribution are already included in the resolved photon one, described in terms of the photon structure functions. A suitable subtraction mechanism has to be found in order to avoid double counting. Inelastic ep scattering requires the knowledge of photon structure functions over a wide range in photon virtuality, in particular from approximately zero up to almost 105 GeV2 at HERA. We analyse the real and virtual photon structure function and we comment on the structure of the photon in the intermediate region of low virtuality. We finally describe how ep cross sections can be obtained as functions of the virtuality of the exchanged photon.

Original languageEnglish
Pages (from-to)139-152
Number of pages14
JournalZeitschrift für Physik C Particles and Fields
Issue number1
Publication statusPublished - 1993 Mar
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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