Extended SAID Partial-Wave Analysis of Pion Photoproduction
arXiv:2309.06631
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.
30 pages, 18 figures, and 14 tables