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A Cloud Chamber Study of Anomalous θ⁰ Particles


Kadyk, John Amos (1957) A Cloud Chamber Study of Anomalous θ⁰ Particles. Dissertation (Ph.D.), California Institute of Technology. doi:10.7907/JBNR-QM30.


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 [...].

Item Type:Thesis (Dissertation (Ph.D.))
Subject Keywords:(Physics and Mathematics)
Degree Grantor:California Institute of Technology
Division:Physics, Mathematics and Astronomy
Major Option:Physics
Minor Option:Mathematics
Thesis Availability:Public (worldwide access)
Research Advisor(s):
  • Anderson, Carl D.
Thesis Committee:
  • Unknown, Unknown
Defense Date:1 January 1957
Record Number:CaltechETD:etd-07142004-141241
Persistent URL:
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:2878
Deposited By: Imported from ETD-db
Deposited On:16 Jul 2004
Last Modified:16 Aug 2023 21:10

Thesis Files

PDF (Kadyk_ja_1957.pdf) - Final Version
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