Chiral Three-Nucleon Forces from p-wave Pion Production

Details Chiral Three-Nucleon Forces from p-wave Pion Production Chiral Three-Nucleon Forces from p-wave Pion Production

2000-04-13

arxiv.org/abs/nucl-th/0004033v1

Phys.Rev.Lett.85:2905-2908,2000

Physics

Nuclear Physics

Nuclear Theory

4 pages, 3 figures

Scientific paper

10.1103/PhysRevLett.85.2905

Production of p-wave pions in nucleon-nucleon collisions is studied according to an improved power counting that embodies the constraints of chiral symmetry. Contributions from the first two non-vanishing orders are calculated. We find reasonable convergence and agreement with data for a spin-triplet cross section in $pp\to pp\pi^0$,with no free parameters. Agreement with existing data for a spin-singlet cross section in $pp\to pn\pi^+$ constrains a short-range operator shown recently to contribute significantly to the three-nucleon potential.

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