Thesis -- University of Adelaide, Dept. of Mathematical Physics, 1965. / Typescript.

A Dissertation Submitted to the Faculty of Science University of the Witwatersrand, Johannesburg for the Degree of Master of Science. Johannesburg 1985 / The success of bag models In hadron physics seems to imply that such models should be taken seriously as an approximation to QCD. In this belief a two-centre harmonic oscillator " bag " is utilised to describe kaon-proton scattering. An adiabatic approximation of the resulting system leads to a coupled channels formulation of the scattering problem . Because of Its complexity a solution of the gluon coupling inside a double-centred bag was not attempted; this turns out to be the most important interaction term and is simply parametrised. Even though all potentials are approximated by square wells and a variety of other approximations are made, a fair fit to the experimental phase shift data is obtained. It seems that the " bare " masses of the unstable baryons differ appreciably from positions of the experimental resonances .

The microscopic, momentum space, optical potential description of spin 1/2 x 1/2 scattering is extended to include the coupling of the singlet-triplet spin channels and the exact handling of the Coulomb force. Computing performance in constructing the optical potential and in solving the coupled-channels Lippmann-Schwinger equations is enhanced by parallelization via the PVM library. Cross sections and spin observables are predicted for p - ����C and p - ��He elastic scattering at 500 MeV. The complete set of nucleon-trinucleon reactions is calculated to investigate the sensitivity of these reactions to charge-symmetry breaking effects. / Graduation date: 1996

Typescript / 88 leaves : ill. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / Thesis -- University of Adelaide, Dept. of Mathematical Physics, 1965

The work reported in this thesis covers the latter part of a programme undertaken at A.E.R.E. Harwell to collect data on the nucleon-nucleon scattering problem at energies accessible to the Harwell 280 cm synchrocyclotron. The experiments described belong to the second phase of data collection at these energies in that they do not of themselves determine a unique set of phase shifts in a modified phase-shift analysis, but resolve ambiguities in the earlier data available, or improve the precision to a significant degree. The first chapter contains a review of the nucleon-nucleon scattering problem, and provides a common context for the different types of experiment described. The second chapter is devoted to a description of the development and final form of a polarised proton target for use in the 70-150 Mev region for proton-proton scattering. Radiation damage resulted in a decay of the polarisation produced in this target, and a brief study of this phenomenon (described in Chapter II) was required to supplement the polarisation decay data collected in the spin correlation experiment reported in the third chapter. The third and fourth chapters contain the experimental method and analysis of experiments using the polarised target to determine the spin correlation parameter Cnn in proton-proton scattering at 90° centre of mass for three energies: 74, 98, and 143 Mev; and at 61.8° centre of mass at 143 Mev only. A typical precision of ± 0.05 was obtained for this parameter. The fifth chapter contains a description of the apparatus and methods used for measurements of polarisation in the 98 Mev region: the experiment at 98 Mev to determine P(θ) in p-p scattering is described and analysed in chapter six. Due to a recent remeasurement of the polarisation of the Harwell 142 Mev polarised proton beam, absolute polarisation values were obtained, to a typical precision of ± 2% of the peak value of the asymmetry. The 98 Mev data provide a notably more stringent restriction on phase-shift fits at this energy than previous polarisation information. The preliminary results of a measurement of the absolute differential cross section for p-p scattering at 98.8 Mev are briefly discussed, and the chapter concluded with a compilation of the N-N scattering data now available in the energy range 60-160 Mev.

Thesis (Ph. D.)--University of Washington, 2001. / Vita. Includes bibliographical references (p. 125-160).

Thesis supervisor: Wayne N. Polyzou. Includes bibliographical references (p. 170-175).

Thesis (Ph. D.)--University of Washington, 1999. / Vita. Includes bibliographical references (p. 141-150).

Thesis--University of California, Berkeley, 1962. / "UC-34 Physics" -t.p. "TID-4500 (17th Ed.)" -t.p. Includes bibliographical references (p. 53-55).

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