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Scientific paper
Feb 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991phdt........50t&link_type=abstract
Thesis (PH.D.)--UNIVERSITY OF DELAWARE, 1991.Source: Dissertation Abstracts International, Volume: 53-04, Section: B, page: 189
Other
1
Scientific paper
We examine the effects of different inelasticity models of high energy hadronic interactions on extensive air shower development through Monte Carlo simulations. Our analysis is specifically for the showers with energies ~10^6 TeV as observed by the University of Utah's Fly's Eye detectors. We have generated one dimensional shower profiles with a relatively simple interaction code which is designed to produce gross features of pp interactions up to collider energies. Extrapolation to high energies is incorporated by three distinct inelasticity models. A version of QCD Pomeron model in which the inelasticity can increase rapidly, the Minijet model with moderate increase in inelasticity and the statistical model suggesting the inelasticity steeply decreases at high energies. Another important feature of the interaction code is the way it builds up the p-nucleus interactions starting from the model of pp interactions. As a result of this transition we find the factor of six difference in inelasticity of pp collisions of two extreme models is reduced to a factor of two by the assumed nuclear target effects for p-air collisions. Partly due to the nuclear target effects, and partly due to wide range of primary energies folded in, stimulated depth of maximum distributions of the models did not show wide differences relative to each other. However, high inelasticity together with a realistic treatment of hadron-nucleus collisions showed a substantial improvement toward agreement with the Fly's Eye data.
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