1204.2277 (R. L. Workman et al.)

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

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

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.

View original: http://arxiv.org/abs/1204.2277