Physics – Nuclear Physics – Nuclear Theory
Scientific paper
1996-09-24
Springer Lect. Notes in Physics 488, 124 (1997)
Physics
Nuclear Physics
Nuclear Theory
23 pages REVTeX, 4 Postscript figures, Contribution to the International Conference on Inverse and Algebraic Quantum Scatterin
Scientific paper
10.1007/BFb0104930
The notion of interacting elementary particles for low and medium energy nuclear physics is associated with definitions of potential operators. In principle, this potential carries the rich substructure consisting of quarks and gluons and thus may be deduced from some microscopic model. In this spirit we propose a boson exchange potential from a nonlinear quantum field theory. Essentially, the meson propagators and form factors of conventional models are replaced by amplitudes derived from the dynamics of self-interacting mesons in terms of solitary fields. Contrary to deduction, we position the inversion approach. Using Gel'fand-Levitan and Marchenko inversion we compute local, energy-independent potentials from experimental phase shifts for various partial waves. Both potential models give excellent results for on-shell NN scattering data. In the off-shell domain we study both potential models in PP Bremsstrahlung, elastic nucleon-nucleus scattering and triton binding energy calculations. It remains surprising that for all observables the inversion and microscopic meson exchange potentials are equivalent in their reproduction of data. Finally, we look for another realm of elementary interactions where inversion and meson exchange models can be applied with the hope to find more sensitivity to discern substructure dynamics.
Jaede Lutz
Sander Michael
von Geramb H. V.
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