Radiative Decay Width of Neutral non-Strange Baryons from PWA
Igor I. Strakovsky (GW), William J. Briscoe (GW), Alexander E., Kudryavtsev (ITEP, GW), Viacheslav V. Kulikov (ITEP), Maxim A. Martemyanov, (ITEP), and Vladimir E. Tarasov (ITEP)
TL;DR
This paper reviews the analysis of pion photoproduction on neutrons to determine the electromagnetic decay widths of non-strange baryons, emphasizing the importance of disentangling isoscalar and isovector couplings and accounting for final-state interactions.
Contribution
It provides a comprehensive overview of the methods used by GW SAID and ITEP groups to analyze neutron-target data and extract baryon resonance properties.
Findings
Disentanglement of isoscalar and isovector electromagnetic couplings.
Critical role of final-state interactions in data analysis.
Importance of compatible proton and neutron target data.
Abstract
An overview of the GW SAID and ITEP groups effort to analyze pion photoproduction on the neutron-target will be given. The disentanglement the isoscalar and isovector EM couplings of N* and Delta* resonances does require compatible data on both proton and neutron targets. The final-state interaction plays a critical role in the state-of-the-art analysis in extraction of the gamma n --> pi N data from the deuteron target experiments. It is important component of the current JLab, MAMI-C, SPring-8, ELSA, and ELPH programs
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