Comparison of potential models with thenpscattering data below 350 MeV

Abstract

As a follow-up on our earlier paper we calculate the χ 2 of various NN potential models with respect to the np scattering data. We find that only the most recent potential models give a reasonably good description of these data. Almost none of the potentials is truly an NN potential in the sense that it gives a good description of both pp and np scattering simultaneously. 13.75.Cs, 12.40.Qq, 21.30.+y Typeset using REVT E X

Precise determination of charge-dependent pion-nucleon-nucleon coupling constants

“…We find that, in agreement with the Nijmegen analysis (see [65,66] for comparisons with previous potentials), there is a relatively large degree of uniformity in describing data at different energy bins. …”

Thermal properties of asymmetrical nuclear matter with the new charge-dependent Reid potential

“…V c α (12), V T α (12) and V LS α (12) are the central, tensor and spin-orbit channel-parts of Reid93 interaction [33], respectively. Now by using the trial wave function (3) we construct a cluster expansion for the expectation value of our Hamiltonian (7).…”

“…Very recently, we developed the LOCV method for the new Reid93 potential [33], which is charge dependent and has been fitted very accurately to the partial wave phase shift up to J = 9. We found similar qualitative results with respect to others many-body techniques, but like the old Reid68 the new Reid93 interaction over binds nuclear matter at much larger saturation density [34].…”

Coarse graining the Bethe–Goldstone equation: Nucleon–nucleon high-momentum components

“…In a first step, a partial wave analysis to NN scattering data was carried out [44] and a selection of consistent data was implemented on the basis of statistical significance. The Nijmegen NN database had 4313 pp+np selected scattering data for T LAB ≤ 350 MeV improving on previous approaches [45,46] due to the incorporation of small but crucial long distance effects, such as Charge-dependent One-PionExchange (CD-OPE), vacuum polarization, Coulomb, relativistic and magnetic moments interactions. Unfortunately, the energy dependence of the potential is hard to implement in nuclear structure calculations.…”