SLAC - PUB - 129 August 1963
نویسنده
چکیده
I Some effects of inelastic channels on elastic partial wave amplitudes are discussed. A Lmvinson's <heorem fo: both the real part of the phase shift and the total phase of thz ela;+ic aml;lituie is derived. The CDD singularities required to make the elastic amplitude calculated by single channel inelastic N/D equations agree with the many channel calculation without CDD singuiarities are fully characterized in both the 7 and R methods. Finally, a simple explanation of multiple resonance poles on different Riemann Sheets of the amplitude is given in-terms of the analyticity properties of rj.
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