Pion-proton scattering at TRIUMF and PSI Original Research Article

Present discrepancies in extractions of the pion-proton sigma-term and the size of isospin breaking from pion-proton scattering are at least partly due to inconsistent and missing experimental information. To overcome these problems, a number of experiments on low energy pion-proton scattering have recently been done at TRIUMF and PSI. Results and/or status of these experiments are discussed.