Phys. Rev. Lett. 56, 2785–2788 (1986)Pion-nucleon form factors in the unitary three-body model for NN scatteringReceived 4 April 1986; published in the issue dated 30 June 1986 The possible effects of different off-shell extrapolations of πN scattering are investigated for NN scattering based on the relativistic unitary three-body model. The conventional Δ-isobar model with a soft form factor is found not to lead to a successful description of the pion-production cross section. A refined model which includes the background interactions enables us to use harder form factors, bringing about marked improvements in reproducing the data. © 1986 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.56.2785
DOI:
10.1103/PhysRevLett.56.2785
PACS:
21.30.+y, 13.75.Cs, 13.75.Gx
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