Extended SAID Partial-Wave Analysis of Pion Photoproduction
William J. Briscoe, Axel Schmidt, Igor Strakovsky, Ron L. Workman, (GWU), and Alfred Svarc (Rudjer Boskovic Institute)
TL;DR
This paper presents an extended unified analysis of pion photoproduction data using the Chew-Mandelstam approach, incorporating recent measurements and focusing on photo-decay amplitudes and ng couplings.
Contribution
It introduces an extended, comprehensive partial-wave analysis combining recent experimental data with a unified theoretical framework.
Findings
Enhanced understanding of photo-decay amplitudes at the pole.
Insights into ng couplings and their influence on fits.
Comparison of energy-dependent and single-energy analyses.
Abstract
A unified Chew-Mandelstam description of single-pion photoproduction data, together with pion- and eta-hadroproduction data, has been extended to include measurements carried out over the last decade. We consider photo-decay amplitudes evaluated at the pole with particular emphasis on ng couplings and the influence of weighting on our fits. Both energy-dependent and single-energy analysis (energy-binned data) are considered.
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Taxonomy
TopicsQuantum Chromodynamics and Particle Interactions · Particle physics theoretical and experimental studies · Nuclear physics research studies