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Type of Document	Dissertation
Author	Kayser, Boris
URN	etd-09232002-105204
Persistent URL	http://resolver.caltech.edu/CaltechETD:etd-09232002-105204
Title	Dynamical model of the sigma hyperon
Degree	PhD
Option	Physics
Advisory Committee	Advisor Name Title Unknown Committee Member
Keywords	None
Date of Defense	1964-05-20
Availability	unrestricted
Abstract NOTE: Text or symbols not renderable in plain ASCII are indicated by [...]. Abstract is included in .pdf document. In the spirit of the bootstrap hypothesis, a dynamical model is developed for the [sigma] hyperon, taking into account the [...] and [...] channels. Born amplitudes for the exchange of [...] (1385 Mev), [...] (1405 Mev), and [...] form the inputs to dynamical calculations which utilize an extension of the matrix ND-[superscript 1] method. The properties of all particles other than the [sigma] are taken from experiment, or, where they are experimentally uncertain, estimated on the basis of current theoretical ideas and then varied in the calculations. The cutoff which governs the damping of the input amplitudes at high energies is also varied. It is found that quite a few combinations of the experimental unknowns and the cutoff do lead to a self-consistent [...] bound state, identified as the [sigma], with reasonable values for the mass [...] and couplings [....] and [...]. These results favor the conjecture that the [sigma] is a composite particle.
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