Chiral 2π exchange at fourth order and peripheral NN scattering

D. R. Entem and R. Machleidt
Phys. Rev. C 66, 014002 – Published 17 July 2002
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Abstract

We calculate the impact of the complete set of two-pion exchange contributions at chiral fourth order (also known as next-to-next-to-next-to-leading order) on peripheral partial waves of nucleon-nucleon scattering. Our calculations are based upon the analytical studies by Kaiser. It turns out that the contribution of fourth order is substantially smaller than the one of third order, indicating convergence of the chiral expansion. We compare the prediction from chiral pion exchange with the corresponding one from conventional meson theory as represented by the Bonn full model and find, in general, good agreement. Our calculations provide a sound basis for investigating the issue whether the low-energy constants determined from πN lead to reasonable predictions for NN.

  • Received 14 February 2002

DOI:https://doi.org/10.1103/PhysRevC.66.014002

©2002 American Physical Society

Authors & Affiliations

D. R. Entem* and R. Machleidt

  • Department of Physics, University of Idaho, Moscow, Idaho 83844

  • *On leave from University of Salamanca, Spain. Electronic address: dentem@uidaho.edu
  • Electronic address: machleid@uidaho.edu

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Vol. 66, Iss. 1 — July 2002

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