Updated analysis of $π$N elastic scattering data to 2.1~GeV: The Baryon Spectrum

Details Updated analysis of $π$N elastic scattering data to 2.1~GeV: The Baryon Spectrum Updated analysis of $π$N elastic scattering data to 2.1~GeV: The Baryon Spectrum

1995-05-29

arxiv.org/abs/nucl-th/9505040v1

Phys.Rev.C52:2120-2130,1995

Physics

Nuclear Physics

Nuclear Theory

25 pages of text plus 5 figures. Revtex file and postscript figures available via anonymous FTP at ftp://clsaid.phys.vt.edu/pu

Scientific paper

10.1103/PhysRevC.52.2120

We present the results of energy-dependent and single-energy partial-wave analyses of $\pi$N 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 $S_{11}$ and $F_{15}$ partial-wave amplitudes. Our results are compared with those found by the Karlsruhe, Carnegie-Mellon$-$Berkeley, and Kent State groups.

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