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Calculating microscopic optical potentials for elastic nucleon-nucleusscattering has already led to large body of work in the past. For foldingfirst-order calculations the nucleon-nucleon (NN) interaction and the one-bodydensity of the nucleus were taken as input to rigorous calculations in aspectator expansion of the multiple scattering series.  Based on the Watson expansion of the multiple scattering series we employ anonlocal translationally invariant nuclear density derived from a chiralnext-to-next-to-leading order (NNLO) and the very same interaction forconsistent full-folding calculation of the effective (optical) potential fornucleon-nucleus scattering for light nuclei.  We calculate scattering observables, such as total, reaction, anddifferential cross sections as well as the analyzing power and thespin-rotation parameter, for elastic scattering of protons and neutrons from$^4$He, $^{6}$He, $^{12}$C, and $^{16}$O, in the energy regime between 100 and200~MeV projectile kinetic energy, and compare to available data.  Our calculations show that the effective nucleon-nucleus potential obtainedfrom the first-order term in the spectator expansion of the multiple scatteringexpansion describes experiments very well to about 60 degrees in thecenter-of-mass frame, which coincides roughly with the validity of the NNLOchiral interaction used to calculate both the NN amplitudes and the one-bodynuclear density.

Ab initio Folding Potentials for Nucleon-Nucleus Scattering based on NCSM One-Body Densities