Extraction of Resonance Parameters from Nuclear Scattering Data
M. U. AhmedDepartment of Physics, University of Notre Dame, Notre Dame, Indiana 46556Paul E. ShanleyDepartment of Physics, University of Notre Dame, Notre Dame, Indiana 46556
1976en
ABI
Abstract
A procedure is described for extracting the pole position of a resonant amplitude from a knowledge of the phase shift versus energy. Pole positions are determined for the four $p$-wave resonances in the nucleon-$\ensuremath{\alpha}$ system with high precision. The use of the pole position to define the mass of unstable nuclear states is discussed.
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