Updated determination of $N^*$ resonance parameters using a unitary, multichannel formalism
Results are presented for an updated multichannel energy-dependent partial-wave analysis of $πN$ scattering. Our earlier work incorporated single-energy amplitudes for $πN \rightarrow πN$, $γN \rightarrow πN$, $πN \rightarrow ππN$, $πN \rightarrow ηN$, and $πN \rightarrow K Λ$. The present work incorporates new single-energy solutions for $γp \rightarrow ηp$ up to a c.m.\ energy of 1990~MeV, $γp \rightarrow K^+ Λ$ up to a c.m.\ energy of 2230~MeV, and $γn \rightarrow ηn$ up to a c.m.\ energy of 1885~MeV, as well as updated single-energy solutions for $πN \rightarrow ηN$, $πN \rightarrow K Λ$, and $γN \rightarrow πN$. In this paper, we present and discuss the resonance parameters obtained from a combined fit of all these single-energy amplitudes. Our determined energy-dependent amplitudes provide an excellent description of the corresponding measured observables.