Progress report, May 15, 1975--April 15, 1976. [Summaries of research activities at University of Washington]
Progress was made on a research program directed to the study of multiparticle production in heavy nuclei by 200 to 400 GeV protons and mesons at the Fermi National Accelerator Laboratory. The work was directed to the study of the development of the intranuclear cascading processes in nuclei having atomic mass numbers as large as A = 184. The experimental results have been compared with the current theories, energy-flux-cascade model, two-phase model, coherent-production model and thermodynamic-hydrodynamical model. While each theory provides a satisfactory explanation of a portion of the experimental results, considerably more work is required to understand the development of multiparticle cascades in large nuclei. Work is in progress to investigate the type of particles produced in deep inelastic interactions of 150 GeV muons. A new technique was introduced in this experiment that made it possible to locate very rare modes of interactions in a nuclear emulsion target. The desired high resolution required nuclear emulsions as a target but the rarity of deep-inelastic events, approximately equal to 1/1000, prohibited the use of ordinary scanning methods. The new feature of this experiment was the use of counter systems to predict the location of the interaction. Scanning time was then reduced to a small portion of the experiment. Work on the examination of the deep inelastic interactions started in February and the particles emitted in the interactions are being measured. Information is being sought on the production of particles of the type predicted by theory (charm, etc.) as well as any other ''new'' type of short-lived particles.
- Research Organization:
- Washington Univ., Seattle (USA). Dept. of Physics
- DOE Contract Number:
- EY-76-S-06-2225
- OSTI ID:
- 7256273
- Report Number(s):
- RLO-2225-T27-8
- Country of Publication:
- United States
- Language:
- English
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High energy physics studies of particle interactions and the search for new particles. Annual progress report, May 15, 1978--May 14, 1979. [Summaries of research activities at Washington University]
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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
BARYON REACTIONS
CHARGED-PARTICLE REACTIONS
DEEP INELASTIC SCATTERING
ENERGY RANGE
GEV RANGE
GEV RANGE 100-1000
HADRON REACTIONS
HEAVY NUCLEI
INELASTIC SCATTERING
INTERACTIONS
LEPTON REACTIONS
LEPTON-BARYON INTERACTIONS
LEPTON-HADRON INTERACTIONS
LEPTON-NUCLEON INTERACTIONS
MESON REACTIONS
MUON REACTIONS
NUCLEAR CASCADES
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
PARTICLE INTERACTIONS
PROTON REACTIONS
SCATTERING