arXiv:2309.06631·v1·High Energy Physics — Phenomenology
Extended SAID Partial-Wave Analysis of Pion Photoproduction
William J. Briscoe🇺🇸 · Axel Schmidt🇺🇸 · Igor Strakovsky🇺🇸 · Ron L. Workman (GWU)🇺🇸 · Alfred Svarc (Rudjer Boskovic Institute)🇭🇷
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.
Comments: 30 pages, 18 figures, and 14 tables