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arxiv: 1208.2710 · v2 · pith:IEA6FOJYnew · submitted 2012-08-13 · ✦ hep-ph · hep-ex· nucl-ex· nucl-th

Multichannel parametrization of π N scattering amplitudes and extraction of resonance parameters

classification ✦ hep-ph hep-exnucl-exnucl-th
keywords multichannelparametersresonanceamplitudeschannelsparametrizationpartial-wavescattering
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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.

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