Complete experiments in pseudoscalar meson photoproduction

TL;DR

This paper discusses the challenge of uniquely extracting photoproduction amplitudes from complete experiments, focusing on both full amplitude and multipole determinations, with preliminary results from recent polarization data.

Contribution

It provides a detailed analysis of the problem and presents initial results on multipole fitting and error estimation from recent polarization measurements.

Findings

Preliminary multipole fits achieved from polarization data.

Error estimation methods for multipole extraction are discussed.

Insights into the uniqueness of amplitude extraction from complete experiments.

Abstract

The problem of extracting photoproduction amplitudes uniquely from so called complete experiments is discussed. This problem can be considered either for the extraction of full production amplitudes, or for the determination of multipoles. Both cases are treated briefly. Preliminary results for the fitting of multipoles, as well as the determination of their error, from recent polarization measurements in the $\Delta$-region are described in more detail.