arXiv:1204.2277·v1·High Energy Physics — Phenomenology
Parameterization dependence of T matrix poles and eigenphases from a fit to piN elastic scattering data
R. L. Workman (GWU)🇺🇸 · R. A. Arndt (GWU)🇺🇸 · W. J. Briscoe (GWU)🇺🇸 · M. W. Paris (LANL)🇺🇸 · I. I. Strakovsky (GWU)🇺🇸
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.
Comments: 6 pages, 3 figures, 1 table