A Cloud Chamber Study of Anomalous θ⁰ Particles

Citation

Kadyk, John Amos (1957) A Cloud Chamber Study of Anomalous θ⁰ Particles. Dissertation (Ph.D.), California Institute of Technology. doi:10.7907/JBNR-QM30. https://resolver.caltech.edu/CaltechETD:etd-07142004-141241

Abstract

NOTE: Text or symbols not renderable in plain ASCII are indicated by [...]. Abstract is included in .pdf document. Eighteen anomalous, [...], decay events observed in the magnet cloud chambers have been analyzed. Some of the major problems involved in the analysis are discussed and the methods used to resolve them are described. The results indicate that [...] decays involve 3 or more secondary particles, and probably arise from a [...] meson having approximately the mass of all other known K particles, viz. 966[...]. Many of the decays are found to be dynamically inconsistent with the [...] scheme, but most are consistent with the decay processes: [...]. However, at least one event is inconsistent with each decay scheme. From the locations of the decays in the cloud chamber, the lifetime is found to be significantly longer than that of the normal [...] particle, called here the [...] particle. Other differences in the behavior of the [...] particles were also observed in the (a) momentum distributions, (b) origin locations, (c) relative numbers of [...] and [...] particles traveling upward, and (d) the types of V particles produced in association with the [...] and [...]. It is concluded that not all the [...] decays can result from alternate decay modes of the [...]. Moreover many decays can be neither [...] decays nor alternate decays of the [...]. The characteristics of the [...] particle proposed by Gell-Mann and Pais are consistent with those of the [...] particle, with the possible exception of the observed types of associations. An estimate was made of the relative number of [...] particles observed to decay in the cloud chamber. If all [...] decays are assumed to arise from decays of the [...] particle, then a lower limit for the [...] lifetime is found to be about [...].

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