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arXiv · 1204.2277

Parameterization dependence of T matrix poles and eigenphases from a fit to piN elastic scattering data

R. L. Workman·R. A. Arndt·W. J. Briscoe·M. W. Paris·I. I. Strakovsky
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Abstract

We compare fits to piN elastic scattering data, based on a Chew-Mandelstam K-matrix formalism. Resonances, characterized by T-matrix poles, are compared in fits generated with and without explicit Chew-Mandelstam K-matrix poles. Diagonalization of the S matrix yields the eigenphase representation. While the eigenphases can vary significantly for the different parameterizations, the locations of most T-matrix poles are relatively stable.

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R. L. Workman, R. A. Arndt, W. J. Briscoe, M. W. Paris, I. I. Strakovsky. 2012-04-10. Parameterization dependence of T matrix poles and eigenphases from a fit to piN elastic scattering data. https://doi.org/10.1103/physrevc.86.035202

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