Measurements of the observables σ_{0}, T, F, E, G for reactions γp → pπ^{0}, γp → pη, γp → pη^{'} at MAMI and ELSA will be fully analyzed. Together with new data from JLab a data set with unprecedented precision and completeness will be available.

A single-energy PWA using analytical constraints will be performed of all reactions mentioned above. The obtained amplitudes will be analyzed with the L+P expansion method in order to identify resonance contributions, to obtain pole parameters, and to search for new resonances. The π-MAID, η-MAID and η^{'}-MAID models will be updated using all available new data.

Data on photoproduction off neutrons from MAMI and ELSA will be partially analyzed. Within this project the helicity dependence of π^{0} photoproduction will be precisely determined in the energy range of MAMI.

The decays J/ψ → n̅pπ^{-}, J/ψ → p̅nπ^{+}, and J/ψ → p̅pπ^{0} will be reconstructed using the full data set from the BESIII experiment. An interpretation of the angular distributions using a partial wave analysis based on an isobar model will be performed.

Preliminary results on decays into pp̅ → η and p̅p → η^{'} final states will be available.

A benchmark calculation of the a_{0} mass in two-flavor LQCD will be performed. Results on the η and a_{0} masses in 2+1 flavor QCD with heavier-than-physical kaons as well as exploratory calculations of the a_{0} in the full two-channel problem are expected.