Abstract
We have studied the form dependence of fits to elastic scattering data, based on a Chew-Mandelstam -matrix formalism. Extracted partial-wave amplitudes and resonances characterized by -matrix poles are compared in fits generated with and without explicit Chew-Mandelstam -matrix poles. Diagonalization of the -matrix yields the eigenphase representation. While the eigenphases can vary significantly for the different parametrizations, the locations of most -matrix poles are relatively stable. We also find the partial-wave amplitudes for elastic scattering to be quite stable. By turning on and off the explicit Chew-Mandelstam pole contributions, we are able to determine how the -matrix poles are generated in this approach.
- Received 16 April 2012
DOI:https://doi.org/10.1103/PhysRevC.86.035202
©2012 American Physical Society