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Paper detail

Pole structure from energy-dependent and single-energy fits to $πN$ elastic scattering data

The pole structure of the current GW/SAID partial-wave analysis of elastic $πN$ scattering and $ηN$ production data is studied. Pole positions and residues are extracted from both the energy-dependent and single-energy fits, using two different methods. For the energy-dependent fits, both contour integration and a Laurent+Pietarinen approach are used. In the case of single-energy fits, the Laurent+Pietarinen approach is used. Errors are estimated and the two sets of results are compared to other recent and older fits to data.

preprint2015arXivOpen access
Alfred ŠvarcMirza HadžimehmedovićHedim OsmanovićJugoslav StahovRon L. Workman
nucl-th
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Alfred ŠvarcMirza HadžimehmedovićHedim OsmanovićJugoslav StahovRon L. Workman

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