V-Particle Production

Citation

Shelton, Frank Harvey (1953) V-Particle Production. Dissertation (Ph.D.), California Institute of Technology. doi:10.7907/79GV-BM08. https://resolver.caltech.edu/CaltechETD:etd-05092003-162924

Abstract

NOTE: Text or symbols not renderable in plain ASCII are indicated by [...]. Abstract is included in .pdf document. In set of about 23,000 cloud chamber photographs, 37 V[...]-particles and 9 charged V-particles were produced in nuclear interactions in a lead plate between two cloud chambers in a magnetic field. An analysis of the circumstances of occurrence of V-particles strongly indicates that the V-particles were produced principally by mesons. Production of V[...]-particles by nucleons is also indicated. By a study of the multiplicity of the stars containing V[...]-particles, the average momentum of the particles producing V[...]-particles is found by several methods to be about 10 Bev/c. At present it appears that all V[...]-particles were produced by particles having momenta in excess of about 2 Bev/c. It is found that the V[...]-particle is produced in the center-of-mass system with about 400 Mev/c momentum. In order that the cross-section for V[...]particle production be checked, an interaction length for penetrating shower particles is found to be 340 [plus or minus] 40 gr/[square centimeter], and is a value that is consistent with the results obtained in other cloud chamber experiments. About one in twenty interactions by penetrating-shower particles whose momenta are in excess of 1 Bev/c results in a V[...]-particle being produced. About 2 percent of all of the shower particles produced in penetrating-shower particle interactions are V[...]-particles. A measurement which might indicate a high angular momentum in the V[...]-particle is obtained far each V[...]-particle produced in the lead plate. The best examples are recalculated. There is a weak indication that the V[...]-particle has a high angular momentum.

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