, Volume 8, Issue 8, pp 851-854
Date: 07 Dec 2011

Proton-nucleus inelastic cross section at ultra high energy

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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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