Primary-cosmic-ray protons above 10/sup 15/ eV derived from the observation of superhigh-energy halo events
The primary-cosmic-ray proton flux >10/sup 15/ eV is derived through analyses on superhigh-energy halo events observed by the Mt. Fuji and Mt. Kanbala emulsion-chamber experiments. Interpretations are made for the origin of halo events based on Monte Carlo simulation, which clarifies the sensitivity of the halo events to the primary-composition and nuclear-interaction models. It is shown that the intensity of the halo events is most sensitive to the primary proton flux and the feature of the fragmentation region of the multiple production. The proton flux >10/sup 15/ eV is estimated as nearly 3 times less than the extrapolated low-energy measurement by Ryan et al. suggesting the heavy-nuclei dominance above the knee energy of the total spectrum.
- Research Organization:
- Institute of High Energy Physics, Academia Sinica, China
- OSTI ID:
- 6894808
- Journal Information:
- Phys. Rev. D; (United States), Journal Name: Phys. Rev. D; (United States) Vol. 38:5; ISSN PRVDA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
645103 -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Strong Interactions & Baryon & Meson Properties
645400 -- High Energy Physics-- Field Theory
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BARYONS
COSMIC PROTONS
COSMIC RADIATION
CROSS SECTIONS
ELEMENTARY PARTICLES
ENERGY RANGE
ENERGY SPECTRA
FERMIONS
FIELD THEORIES
FRAGMENTATION
HADRONS
IONIZING RADIATIONS
JET MODEL
MATHEMATICAL MODELS
MONTE CARLO METHOD
MULTIPLE PRODUCTION
MULTIPLICITY
NUCLEAR EMULSIONS
NUCLEONS
PARTICLE MODELS
PARTICLE PRODUCTION
PARTICLE PROPERTIES
PARTICLE RAPIDITY
PRIMARY COSMIC RADIATION
PROTONS
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
RADIATIONS
SPECTRA
TEV RANGE