6533b839fe1ef96bd12a5a19

RESEARCH PRODUCT

Single-energy partial wave analysis for π0 photoproduction on the proton with fixed- t analyticity imposed

subject

description

High-precision data of the $\ensuremath{\gamma}p\ensuremath{\rightarrow}{\ensuremath{\pi}}^{0}p$ reaction from its threshold up to $W=1.9\phantom{\rule{0.28em}{0ex}}\mathrm{GeV}$ have been used in order to perform a single-energy partial-wave analysis with minimal model dependence. Continuity in energy was achieved by imposing constraints from fixed-$t$ analyticity in an iterative procedure. Reaction models were only used as starting point in the very first iteration. We demonstrate that, with this procedure, partial-wave amplitudes can be obtained which show only a minimal dependence on the initial model assumptions.