p – air production cross-section and uncorrelated mini-jets processes in pp-scattering
1 Instituto de Física Teórica, UNESP, Rua Dr. Bento T. Ferraz, 271, Bloco II, 01140-070, São Paulo - SP, Brazil
2 Departamento de Física Teórica y del Cosmos, Universidad de Granada, 18071 Granada, Spain
3 INFN Frascati National Laboratories, Via E. Fermi 40, Frascati I00044, Italy
4 Physics Department, University of Perugia, Perugia, Italy
5 Kharkov Institute of Physics and Technology 61108, Akademicheskaya,1, Kharkov, Ukraine Institute of Nuclear Physics PAN ul. Radzikowskiego 152 31-342 Krakow, Poland
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Published online: 24 March 2015
For the p – air production cross-section, we use a Glauber formalism which inputs the pp inelastic cross-section from a mini-jet model embedded in a single-channel eikonal expression, that provides the needed contribution of uncorrelated processes. It is then shown that current LO parton density functions for the pp mini-jet cross-sections, with a rise tempered by acollinearity induced by soft gluon re-summation, are well suited to reproduce recent cosmic ray results. By comparing results for GRV, MRST72 and MSTW parametrizations, we estimate the uncertainty related to the low-x behavior of these densities.
© Owned by the authors, published by EDP Sciences, 2015
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