Chiral EFT corrections to ab initio M1 observables in p-shell nuclei*

In ab initio nuclear theory we strive to make quantitative predictions of nuclear observables, starting with the internucleon interaction. Modern realistic interactions, such as the LENPIC interactions, are derived systematically from chiral effective field theory (χEFT). The same χEFT treatment used for deriving the interaction can be used to derive consistent effective operators for electroweak properties. Using the effective M1 operator derived consistently with the semi-local coordinate-space LENPIC interaction up to N²LO, we use the no-core configuration interaction (NCCI), or no-core shell model (NCSM), approach to calculate electromagnetic properties of a variety of nuclei in the p-shell. We present results for magnetic moments and M1 transition matrix elements, and explore convergence behavior of the χEFT corrections.