The present status of the theory of nucleon resonances in nuclei is reviewed. A detailed account is given of the techniques used to generate these resonance configurations from the purely nucleonic configurations. Situations in two- and three-nucleon systems in which the resonance configurations appear to play a role are discussed. Heavier nuclei are also mentioned. The effect of resonances in nuclear and neutron matter is also reviewed.

https://iopscience.iop.org/article/10.1088/0034-4885/39/12/001/pdf

Nucleon resonance in nuclei

Leading-order three-nucleon forces that violate isospin symmetry are calculated in heavy-baryon chiral perturbation theory. The effect of the charge-symmetry-breaking three-nucleon force is investigated in the trinucleon systems using Faddeev calculations. We find that the contribution of this force to the $^{3}\mathrm{He}\ensuremath{-}^{3}\mathrm{H}$ binding-energy difference is given by $\ensuremath{\Delta}{E}_{3\mathrm{NF}}^{\mathrm{CSB}}\ensuremath{\approx}5$ keV.

M.D. Shuster

Papers

Isotensor electromagnetic currents and nuclear isobar masses