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In order to establish links between p-wave pion production in nucleon-nucleoncollisions and low energy three-nucleon scattering, an extensive programme ofexperiments on pion production is currently underway at COSY-ANKE. The finalproton pair is detected at very low excitation energy, leading to an S-wavediproton, denoted here as {pp}_s. We now report on measurements of thedifferential cross section and analysing power of the pol{p}p->{pp}_s pi^0$reaction at 353 MeV. Both observables can be described in terms of s- andd-wave pion production and, by using the phase information from elastic ppscattering, unique solutions can be obtained for the corresponding amplitudes.This information is vital for the partial wave decomposition of thecorresponding pn->{pp}_s pi^- reaction and hence for the extraction of thep-wave terms.

Differential cross section and analysing power of the pp -> {pp\}_s pi0 reaction at 353 MeV