Information Content of Polarization Measurements

Abstract

Information entropy is applied to the state of knowledge of reaction amplitudes in pseudoscalar meson photoproduction, and a scheme is developed that quantifies the information content of a measured set of polarization observables. It is shown that this definition of information is a more practical measure of the quality of a set of measured observables than whether the combination is a mathematically complete set. It is also shown that when experimental uncertainty is introduced, complete sets of measurements do not necessarily remove ambiguities, and that experiments should strive to measure as many observables as practical in order to extract amplitudes.

19 pages, 4 figures; figures updated, minor textual corrections

References in corpus (2)

• Spin observables and spin structure functions: inequalities and dynamics
• Positivity Constraints on Spin Observables in Exclusive Pseudoscalar Meson Photoproduction

Cited by in corpus (1)

• Polarization observables in the longitudinal basis for pseudo-scalar meson photoproduction using a density matrix approach