For photoproduction reactions with final states consisting of two pseudoscalar mesons and a spin-1/2 baryon, eight complex amplitudes need to be determined uniquely. A modified version of Moravcsik's theorem is employed for these reactions, resulting in slightly overcomplete sets of polarization observables that are able to determine the amplitudes uniquely. Further steps were taken to reduce the found sets to minimal complete sets. As a final result, multiple minimal complete sets without any remaining ambiguities are presented for the first time. These sets consist of $2N=16$ observables, containing only one triple polarization observable.

• Received 14 September 2020
• Accepted 16 December 2020

DOI:https://doi.org/10.1103/PhysRevC.103.014607