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First calculations for spin-dependent observables of the reactions $pp \topp\pi^0$, $pp \to pn\pi^+$ and $pp \to d\pi^+$ near threshold are presented,employing the J\"ulich model for pion production. The influence of resonant(via the excitation of the $\Delta (1232)$) and non-resonant p-wave pionproduction mechanisms on these observables is examined. For the reactions $pp\to pn\pi^+$ and $pp \to d\pi^+$ nice agreement of our predictions with thepresently available data on spin correlation coefficents is observed whereasfor $pp \to pp\pi^0$ the description of the data is less satisfying.Comment: 10 pages, 4 figure

physical review. c. nuclear physics/physical review. c, nuclear physics

Polarization phenomena in the reaction<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>N</mml:mi><mml:mrow><mml:mrow><mml:mover><mml:mrow><mml:mi>N</mml:mi></mml:mrow><mml:mrow><mml:mo>→</mml:mo></mml:mrow></mml:mover></mml:mrow></mml:mrow><mml:mi>NN</mml:mi><mml:mi>π</mml:mi></mml:math>near threshold

Polarization phenomena in the reactionNN→NNπnear threshold