Multichannel parametrization of \pi N scattering amplitudes and   extraction of resonance parameters
  We present results of a new multichannel partial-wave analysis for \pi N scattering in the c.m. energy range 1080 to 2100 MeV. This work explicitly includes \eta N and K \Lambda channels and the single pion photoproduction channel. Resonance parameters were extracted by fitting partial-wave amplitudes from all considered channels using a multichannel parametrization that is consistent with S-matrix unitarity. The resonance parameters so obtained are compared to predictions of quark models. 
M. Shrestha and D. M. Manley
hep-ph hep-ex nucl-ex nucl-th