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Type: Artigo de periódico
Title: Hadron-rich Cosmic-ray Families Detected By Emulsion Chamber
Author: Navia C.E.
Augusto C.R.A.
Pinto F.A.
Shibuya E.H.
Abstract: The observed hadrons in excess, larger-than-expected charged mesons (pions) in cosmic-ray families detected in emulsion chamber experiment at mountain altitude (5220 m above sea level) and produced in cosmic-ray hadronic interaction not far from PeV energy region are here studied. The hypothesis that these extra hadrons could be a bundle of surviving nuclear fragments (nucleons) is verified through a simulation method using a hybrid code composed by a superposition model to describe the number of interacting pairs of nucleon-nucleon in a nucleus-nucleus collision. Together with the UA5 algorithm to describe nucleon-nucleon collision, atmospheric propagation structure is also considered. A comparison between simulation output with experimental data shows that the surviving-nuclear-fragments hypothesis is not enough to explain non-pionic hadron excess, even if a heavy dominance composition in the primary flux is considered. © 1995 Società Italiana di Fisica.
Editor: Società Italiana di Fisica
Rights: fechado
Identifier DOI: 10.1007/BF02789487
Date Issue: 1995
Appears in Collections:Unicamp - Artigos e Outros Documentos

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