Physics of Particles and Nuclei Letters

, Volume 8, Issue 8, pp 851–854

Proton-nucleus inelastic cross section at ultra high energy

  • Takeshi Kodama
  • Licínio Portugal


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 Xmax 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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