Proton-nucleus inelastic cross section at ultra high energy |
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| Authors: | Takeshi Kodama Licínio Portugal |
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| Institution: | 1.Instituto de Física,Universidade Federal do Rio de Janeiro,Rio de Janeiro,Brasil;2.Instituto de Física,Universidade Federal Fluminense,Niterói,Brasil |
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| 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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