Unified Chew-Mandelstam SAID analysis of pion photoproduction data
Ron L. Workman, Mark W. Paris, William J. Briscoe, Igor I. Strakovsky, (GWU)
TL;DR
This paper presents a unified analysis of pion photoproduction and related data using a Chew-Mandelstam approach that respects unitarity, providing a comprehensive partial wave analysis compared to previous models.
Contribution
It introduces a unified Chew-Mandelstam parametrization for pion photoproduction data that maintains unitarity and compares new partial wave analyses with existing models.
Findings
Consistent description of pion photoproduction, pion, and eta-hadroproduction data.
Comparison shows improved agreement with previous SAID fits.
Enhanced understanding of two-body unitarity in photoproduction processes.
Abstract
A unified description of single-pion photoproduction data, together with pion- and eta-hadroproduction data, has been achieved in a Chew-Mandelstam parametrization which is consistent with unitarity at the two-body level. Energy-dependent and single-energy partial wave analyses of pion photoproduction data have been performed and compared to previous SAID fits and multipoles from the Mainz and Bonn-Gatchina groups.
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