Elastic scattering analyses and dispersion relation constraints

Details Elastic scattering analyses and dispersion relation constraints Elastic scattering analyses and dispersion relation constraints

1998-07-31

arxiv.org/abs/nucl-th/9807087v1

Physics

Nuclear Physics

Nuclear Theory

17 pages of text. 3 figures are available from: ftp://clsaid.phys.vt.edu/pub/said/pin/pin

Scientific paper

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. We have considered the effect of adding dispersion-relation constraints required for a more reliable extraction of the pi-N sigma term. The results of these new fits are compared with those generated previously, using a reduced set of constraints, and with a fit which has only utilized forward constraints associated with the S-wave scattering lengths. We compare the results in terms of their resonance spectra and preferred values for the pi-N-N coupling and pi-N sigma term.

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