Nuclear interactions and primary cosmic-ray component around1015eV viewed through the cluster analysis ofγ-ray families
- 1 June 1982
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review D
- Vol. 25 (11), 2807-2819
- https://doi.org/10.1103/physrevd.25.2807
Abstract
An analysis of the -ray families ( TeV) obtained with the Mt. Fuji emulsion chambers was made focusing attention on the cluster structure of families, and the validity of scaling in the fragmentation region in the -eV region was examined by comparing the results with those of artificial families. We deduced that (i) scaling in the fragmentation region (Feynman ) is not broken appreciably, at least below eV, (ii) scaling in the central region () seems to be broken largely at eV; multiplicity increases proportionally to or even stronger (say, ), (iii) the iron component in the primary cosmic rays rapidly increases and occupies 60-70% of the total flux at eV and that of the protons decreases to ≃ 10%, and (iv) the average transverse momentum of produced pions in the fragmentation region stays within ∼400 MeV/c.
Keywords
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