High-precision covariant one-boson-exchange potentials for np scattering below 350 MeV

Details High-precision covariant one-boson-exchange potentials for np scattering below 350 MeV High-precision covariant one-boson-exchange potentials for np scattering below 350 MeV

2007-04-10

arxiv.org/abs/0704.1229v2

Phys.Lett.B657:176-179,2007

Physics

Nuclear Physics

Nuclear Theory

4 pages; revised version with augmented data sets; agrees with published version

Scientific paper

10.1016/j.physletb.2007.10.028

All realistic potential models for the two-nucleon interaction are to some extent based on boson exchange. However, in order to achieve an essentially perfect fit to the scattering data, characterized by a chi2/Ndata ~ 1, previous potentials have abandoned a pure one boson-exchange mechanism (OBE). Using a covariant theory, we have found a OBE potential that fits the 2006 world np data below 350 MeV with a chi2/Ndata = 1.06 for 3788 data. Our potential has fewer adjustable parameters than previous high-precision potentials, and also reproduces the experimental triton binding energy without introducing additional irreducible three-nucleon forces.

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