https://doi.org/10.1140/epjc/s10052-009-1093-0
Regular Article - Theoretical Physics
Total photoproduction cross section at very high energy
1
Centre for High Energy Physics, Indian Institute of Science, Bangalore, 560012, India
2
Departamento de Física Teórica y del Cosmos and CAFPE, Universidad de Granada, 18071, Granada, Spain
3
Theory Group–Research Division, INFN Frascati National Laboratories, Via E. Fermi 40, 00044, Frascati, Italy
4
INFN and Physics Department, University of Perugia, Via A. Pascoli, 06123, Perugia, Italy
* e-mail: pancheri@lnf.infn.it
Received:
18
December
2008
Revised:
11
May
2009
Published online:
21
July
2009
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.
PACS: 13.60.Hb – / 13.85.Lg – / 12.40.Nn – / 12.38.Cy – / 11.80.Fv –
© Springer-Verlag , 2009
