Baryon photo-decay amplitudes at the pole

Abstract

We derive relations for baryon photo-decay amplitudes both for the Breit-Wigner and the pole positions. With an updated SAID partial wave analysis, technically similar to the earliest Virginia Tech analysis of photoproduction data, we compare photo-decay amplitudes at both resonance positions for a few selected nucleon resonances. Comparisons are made and a qualitative similarity, seen between the pole and Breit-Wigner values extracted by the Bonn-Gatchina group, is confirmed in the present study.

5 pages LATEX

References in corpus (7)

• Extended Partial-Wave Analysis of piN Scattering Data
• Properties of baryon resonances from a multichannel partial wave analysis
• Unified Chew-Mandelstam SAID analysis of pion photoproduction data
• Parameterization dependence of T matrix poles and eigenphases from a fit to piN elastic scattering data
• Relevance of complex branch points for partial wave analysis
• Extraction of Electromagnetic Transition Form Factors for Nucleon Resonances within a Dynamical Coupled-Channels Model
• Singularity structure of the pi N scattering amplitude in a meson-exchange model up to energies W < 2.0 GeV

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