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Test of hadronic interaction models in the forward region with KASCADE event rates

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An analysis of muon and hadron rates observed in the central detector of the KASCADE experiment has been carried out. The data are compared with CORSIKA simulations employing the high-energy hadronic interaction models QGSJET, DPMJET, HDPM, SIBYLL and VENUS. In addition, first results with the new hadronic interaction model {neXus 2} are discussed. Differences of the model predictions, both among each other and when confronted with measurements, are observed. The hadron rates mainly depend on the inelastic cross section and on the contribution of diffraction dissociation. The discrepancy between simulations and measurements at low primary energies around 5 TeV can be reduced by increasing the non-diffractive part of the inelastic cross section of nucleon-air interactions. An examination of hadron multiplicities points towards harder spectra of secondary pions and kaons being needed in the calculations.

Document Type: Miscellaneous

Affiliations: 1: Institut für Kernphysik, Forschungszentrum Karlsruhe, D-76021 Karlsruhe, Germany 2: National Institute of Physics and Nuclear Engineering, PO Box Mg-6, RO-7690 Bucharest, Romania 3: Cosmic Ray Division, Yerevan Physics Institute, Yerevan 36, Armenia 4: Institut für Experimentelle Kernphysik, Universität Karlsruhe, D-76021 Karlsruhe, Germany 5: Department of Experimental Physics, University of Lodz, PL-90236 Lodz, Poland 6: Soltan Institute for Nuclear Studies, PL-90950 Lodz, Poland

Publication date: August 1, 2001


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