NN-->NNpi from the effective field theory point of view: short comings and gains

Details NN-->NNpi from the effective field theory point of view: short comings and gains NN-->NNpi from the effective field theory point of view: short comings and gains

2000-06-22

arxiv.org/abs/nucl-th/0006054v1

Acta Phys.Polon. B31 (2000) 2213-2217

Physics

Nuclear Physics

Nuclear Theory

4 pages, 3 figures, Contribution to "MESON2000", Workshop on production, properties and interaction of mesons, Cracow, Poland,

Scientific paper

Based on a counting scheme for the application of chiral perturbation theory to pion production in NN collisions p-wave production is studied. It is demonstrated that, contrary to the s-wave production where loops enter at too low an order to allow the scheme predictive power, there are certain p-wave observables where parameter free predictions are possible. These predictions are consistent with experimental data. We show that the investigation of charged pion production yields a constraint on a contribution to the three-nucleon force with a spin-isospin structure that could resolve the $A_y$ puzzle in $nd$ scattering.

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