On the validity of the resonance approximation to three particle states.

• Main Author: Luke, Trevor MacDonald.
• Other Authors: Margolis, B. (Supervisor)
• Format: Others
• Language: en
• Published: McGill University 1964
• Subjects: Physics.
• Online Access: http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=116559

This work examines the validity of an approximation commonly used to simplify the study of scattering processes at energies above one or more production thresholds. The approximation consists of replacing three particle states by states containing two particles, one of which is a resonance between two of the original three; the resonance is regarded as an ordinary stable particle. The approximation is tested in a modified form of the Lee model, which is sufficiently simple to admit explicit calculation and comparison of "exact" and "resonance approximation" cross sections. the indication of this model calculation is that the approximation is a reasonably good one.