High-precision, charge-dependent Bonn nucleon-nucleon potential

Abstract

We present a charge-dependent nucleon-nucleon (N N ) potential that fits the world proton-proton data below 350 MeV available in the year of 2000 with a χ 2 per datum of 1.01 for 2932 data and the corresponding neutron-proton data with χ 2 /datum = 1.02 for 3058 data. This reproduction of the N N data is more accurate than by any phase-shift analysis and any other N N potential. The charge-dependence of the present potential (that has been dubbed 'CD-Bonn') is based upon the predictions by the Bonn Full Model for charge-symmetry and charge-independence breaking in all partial waves with J ≤ 4. The potential is represented in terms of the covariant Feynman amplitudes for one-boson exchange which are nonlocal. Therefore, the off-shell behavior of the CD-Bonn potential differs in a characteristic and well-founded way from commonly used local potentials and leads to larger binding energies in nuclear few-and many-body systems, where underbinding is a persistent problem.

Nuclear electric dipole moments in chiral effective field theory

“…In order to compare our results with previous ones computed from phenomenological CP-conserving potentials, the Av 18 (Av 18 +UIX) potential [38,39] and the CD-Bonn (CDBonn+TM) potential [40,41] have also been applied for the deuteron (3N cases).…”

The hidden-charm pentaquark and tetraquark states

“…Generally, one also needs to introduce the form factor in each interaction vertex, which reflects the off-shell effect of the exchanged meson and the structure effect, because the components of the molecular state and exchanged mesons are not elementary particles. Although various form factors were adopted in dealing with different systems [186,222,246,247], we take the simple monopole form factor as an example…”

Interplay between tensor force and deformation in even–even nuclei

“…Besides the requirement to include a tensor term to the bare nucleon-nucleon interaction is supported by some well known experimental data such as the none zero quadrupole moment of the deuteron [1,2,3] or the differential cross section of the p-p scattering. Consequently all the most popular potentials used in the ab-initio approaches as the Paris [4], Bonn [5,6,7] or Argonne [8] potentials get a built-in tensor component. Its impact on the shell structure properties has been studied in a large extent: its contribution to the single particle energies depends on the filling of the shells; it induces correlations which strongly influence the n-p pairs structures in light nuclei [9]; the tensor force enables to get a convenient spectrum in the p-shell [10].…”