Baryon photo-decay amplitudes at the pole
R.L. Workman, L. Tiator, A. Sarantsev
TL;DR
This paper derives relations for baryon photo-decay amplitudes at resonance and pole positions, compares these using updated analysis, and confirms qualitative similarities between different extraction methods.
Contribution
It introduces relations for photo-decay amplitudes at both resonance and pole positions and compares these using an updated partial wave analysis.
Findings
Qualitative similarity between pole and Breit-Wigner amplitudes confirmed
Comparison with Bonn-Gatchina results supports previous observations
Updated analysis aligns with earlier findings on baryon photo-decay amplitudes
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.
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