Ab initio elastic scattering from light nuclei based on different chiral two-nucleon forces

Effective interactions (`optical potentials') derived from first principles to describe the elastic

scattering of nucleons from nuclei can be formulated consistently within the spectator expansion of

multiple scattering theory. In its leading order, the NN force enters into the description of the nucleus

as nonlocal one-body density obtained from NCSM structure calculations as well as in the reaction itself

by folding the NN amplitudes with the one-body densities. For consistency, the spin of the struck nucleon

must be taken into account on the same footing as the spin of the projectile nucleon.

In this contribution, we study nucleon-nucleus observables for proton (neutron) elastic scattering and their energy dependence

between 60 and 160 MeV projectile energy based on 3 different chiral NN interactions.

We will look at the effective potentials specifically for cases where the underlying interactions

differ more than the truncation errors of one of the underlying chiral NN interactions would suggest. Our

studies concentrate on elastic NA observables for ¹²C and ¹⁶O.