30 Jun 1994 | V.G.J. Stoks, R.A.M. Klomp, C.P.F. Terheggen, and J.J. de Swart
The paper presents an updated version of the Nijmegen soft-core potential (Nijm93) and three new NN potential models: Nijm I, Nijm II, and Reid93. The Nijm93 potential, based on the older Nijm78 potential, provides a better description of np data with a chi-squared per datum of 1.87. It is equivalent in configuration and momentum space, a unique feature among meson-theoretical potentials. The three new models—Nijm I (non-local Reid-like), Nijm II (local), and Reid93 (regularized Reid)—all have nearly optimal chi-squared per datum and are considered alternative partial-wave analyses. They include the proper charge-dependent one-pion-exchange tail.
The Nijm93 potential is an update of the Nijm78 potential, incorporating the np data and achieving a chi-squared per datum of 1.87. The Nijm I potential, a non-local Reid-like model, achieves a chi-squared per datum of 1.03, indicating a high-quality fit. The Nijm II potential, a local version, also achieves a chi-squared per datum of 1.03. The Reid93 potential, a regularized version of the Reid68 potential, also achieves a chi-squared per datum of 1.03. These models are compared to the Nijmegen PWA93, which has a chi-squared per datum of 0.99. The differences between these models provide insight into systematic errors in the Nijmegen partial-wave analyses.
The paper discusses the structure of the potentials, including the one-pion-exchange (OPE) part, which distinguishes between neutral and charged pion exchanges. The Nijmegen potential includes various meson exchanges, such as pseudoscalar, vector, and scalar mesons. The potentials are constructed with exponential form factors and include terms for the OPE and other interactions. The parameters of the potentials are optimized to fit the scattering data, with the Nijm93 potential achieving a chi-squared per datum of 1.87 for np data and 1.8 for pp data.
The paper also presents the results of the potential models, including the Nijm93, Nijm I, Nijm II, and Reid93. These models are compared to the Nijmegen PWA93, with the Nijm I, Nijm II, and Reid93 models achieving a chi-squared per datum of 1.03. The potentials are used to describe the np and pp scattering data, with the Nijm I and Nijm II potentials showing good agreement with the Nijmegen PWA93 results. The potentials are also used to calculate deuteronThe paper presents an updated version of the Nijmegen soft-core potential (Nijm93) and three new NN potential models: Nijm I, Nijm II, and Reid93. The Nijm93 potential, based on the older Nijm78 potential, provides a better description of np data with a chi-squared per datum of 1.87. It is equivalent in configuration and momentum space, a unique feature among meson-theoretical potentials. The three new models—Nijm I (non-local Reid-like), Nijm II (local), and Reid93 (regularized Reid)—all have nearly optimal chi-squared per datum and are considered alternative partial-wave analyses. They include the proper charge-dependent one-pion-exchange tail.
The Nijm93 potential is an update of the Nijm78 potential, incorporating the np data and achieving a chi-squared per datum of 1.87. The Nijm I potential, a non-local Reid-like model, achieves a chi-squared per datum of 1.03, indicating a high-quality fit. The Nijm II potential, a local version, also achieves a chi-squared per datum of 1.03. The Reid93 potential, a regularized version of the Reid68 potential, also achieves a chi-squared per datum of 1.03. These models are compared to the Nijmegen PWA93, which has a chi-squared per datum of 0.99. The differences between these models provide insight into systematic errors in the Nijmegen partial-wave analyses.
The paper discusses the structure of the potentials, including the one-pion-exchange (OPE) part, which distinguishes between neutral and charged pion exchanges. The Nijmegen potential includes various meson exchanges, such as pseudoscalar, vector, and scalar mesons. The potentials are constructed with exponential form factors and include terms for the OPE and other interactions. The parameters of the potentials are optimized to fit the scattering data, with the Nijm93 potential achieving a chi-squared per datum of 1.87 for np data and 1.8 for pp data.
The paper also presents the results of the potential models, including the Nijm93, Nijm I, Nijm II, and Reid93. These models are compared to the Nijmegen PWA93, with the Nijm I, Nijm II, and Reid93 models achieving a chi-squared per datum of 1.03. The potentials are used to describe the np and pp scattering data, with the Nijm I and Nijm II potentials showing good agreement with the Nijmegen PWA93 results. The potentials are also used to calculate deuteron