Nuclear interactions and primary cosmic-ray component around 10/sup 15/ eV viewed through the cluster analysis of. gamma. -ray families
Journal Article
·
· Phys. Rev. D; (United States)
An analysis of the ..gamma..-ray families (summationE/sub ..gamma../> or approx. =100 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 10/sup 15/-eV region was examined by comparing the results with those of artificial families. We deduced that (i) scaling in the fragmentation region (Feynman x>0.1) is not broken appreciably, at least below 10/sup 15/ eV, (ii) scaling in the central region (x<<0.1) seems to be broken largely at E>10/sup 15/ eV; multiplicity increases proportionally to E/sup 1/4/ or even stronger (say, proportionalE/sup 1/3/), (iii) the iron component in the primary cosmic rays rapidly increases and occupies 60--70% of the total flux at 10/sup 15/ eV and that of the protons decreases to approx. =10%, and (iv) the average transverse momentum of produced pions in the fragmentation region stays within approx.400 MeV/c.
- Research Organization:
- Department of Physics, Hirosaki University, Aomori, Japan
- OSTI ID:
- 5231642
- Journal Information:
- Phys. Rev. D; (United States), Journal Name: Phys. Rev. D; (United States) Vol. 25:11; ISSN PRVDA
- Country of Publication:
- United States
- Language:
- English
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· Phys. Rev. D; (United States)
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Related Subjects
645103* -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Strong Interactions & Baryon & Meson Properties
645104 -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Strong Meson-Induced Interactions-- (-1987)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BARYONS
CLUSTER MODEL
COSMIC PROTONS
COSMIC RADIATION
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
ELEMENTS
FERMIONS
FRAGMENTATION
GAMMA RADIATION
HADRONS
INTERACTIONS
IONIZING RADIATIONS
IRON
LINEAR MOMENTUM
MATHEMATICAL MODELS
METALS
MULTIPLICITY
NUCLEAR EMULSIONS
NUCLEAR MODELS
NUCLEONS
PARTICLE INTERACTIONS
PRIMARY COSMIC RADIATION
PROTONS
RADIATIONS
SCALING LAWS
TRANSITION ELEMENTS
TRANSVERSE MOMENTUM
645104 -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Strong Meson-Induced Interactions-- (-1987)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BARYONS
CLUSTER MODEL
COSMIC PROTONS
COSMIC RADIATION
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
ELEMENTS
FERMIONS
FRAGMENTATION
GAMMA RADIATION
HADRONS
INTERACTIONS
IONIZING RADIATIONS
IRON
LINEAR MOMENTUM
MATHEMATICAL MODELS
METALS
MULTIPLICITY
NUCLEAR EMULSIONS
NUCLEAR MODELS
NUCLEONS
PARTICLE INTERACTIONS
PRIMARY COSMIC RADIATION
PROTONS
RADIATIONS
SCALING LAWS
TRANSITION ELEMENTS
TRANSVERSE MOMENTUM