Nijmegen Soft-Core Potential Including Two-Meson Exchange
V. G. J. Stoks, Th. A. Rijken
Abstract
We report on the progress of the construction of the extended soft-core (ESC) Nijmegen potential. Next to the standard one-boson-exchange parts, the model includes the pion-meson-exchange potentials due to the parallel and crossed-box diagrams, as well as the one-pair and two-pair diagrams, vertices for which can be identified with similar interactions appearing in chiral-symmetric Lagrangians. Although the ESC potential is still under construction, it already gives an excellent description of all N\!N scattering data below 350 MeV with χ2/ datum=1.3.
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