Regular Article - Theoretical Physics

The European Physical Journal C

, Volume 63, Issue 1, pp 69-85

First online:

Total photoproduction cross section at very high energy

  • R. M. GodboleAffiliated withCentre for High Energy Physics, Indian Institute of Science
  • , A. GrauAffiliated withDepartamento de Física Teórica y del Cosmos and CAFPE, Universidad de Granada
  • , G. PancheriAffiliated withTheory Group–Research Division, INFN Frascati National Laboratories Email author 
  • , Y. N. SrivastavaAffiliated withINFN and Physics Department, University of Perugia

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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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