The European Physical Journal C

, Volume 63, Issue 1, pp 69–85

Total photoproduction cross section at very high energy


  • R. M. Godbole
    • Centre for High Energy PhysicsIndian Institute of Science
  • A. Grau
    • Departamento de Física Teórica y del Cosmos and CAFPEUniversidad de Granada
    • Theory Group–Research Division, INFN Frascati National Laboratories
  • Y. N. Srivastava
    • INFN and Physics DepartmentUniversity of Perugia
Regular Article - Theoretical Physics

DOI: 10.1140/epjc/s10052-009-1093-0

Cite this article as:
Godbole, R.M., Grau, A., Pancheri, G. et al. Eur. Phys. J. C (2009) 63: 69. doi:10.1140/epjc/s10052-009-1093-0


In this paper we apply to the photoproduction total cross section a model we have proposed for purely hadronic processes and which is based on QCD mini-jets and soft gluon re-summation. We compare the predictions of our model with the HERA data as well as with other models. For cosmic rays, our model predicts substantially higher cross sections at TeV energies than models based on factorization, but lower than models based on mini-jets alone, without soft gluons. We discuss the origin of this difference.



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© Springer-Verlag / Società Italiana di Fisica 2009