Physics of Particles and Nuclei Letters

, Volume 8, Issue 8, pp 851–854 | Cite as

Proton-nucleus inelastic cross section at ultra high energy

  • Takeshi Kodama
  • Licínio Portugal
Article
  • 52 Downloads

Abstract

Energy dependence of proton-nucleus reaction cross section at very high energy is discussed. It is stressed that depending on the gluon distribution near the nuclear surface, proton-nucleous total cross section increases much more rapidly compared to the usual Glauber independent nucleon estimate. The recent observation of smaller X max than the expected value at UHECR domain can be an indication for such a mechanism.

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Copyright information

© Pleiades Publishing, Ltd. 2011

Authors and Affiliations

  • Takeshi Kodama
    • 1
  • Licínio Portugal
    • 2
  1. 1.Instituto de FísicaUniversidade Federal do Rio de JaneiroRio de JaneiroBrasil
  2. 2.Instituto de FísicaUniversidade Federal FluminenseNiteróiBrasil

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