Updated analysis of πN elastic scattering data to 2.1~GeV: The Baryon Spectrum
R. A. Arndt, I. I. Strakovsky, R. L. Workman, M. M. Pavan
Abstract
We present the results of energy-dependent and single-energy partial-wave analyses of πN elastic scattering data with laboratory kinetic energies below 2.1~GeV. Resonance structures have been extracted using Breit-Wigner fits, speed plots, and a complex plane mapping of the associated poles and zeroes. This is the first set of resonance parameters from a VPI analysis constrained by fixed-t dispersion relations. We have searched our solutions for structures which may have been missed in our previous analyses, finding candidates in the S11 and F15 partial-wave amplitudes. Our results are compared with those found by the Karlsruhe, Carnegie-Mellon-Berkeley, and Kent State groups.
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