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Recently, a new generation of nuclear forces has been developed in theframework of chiral EFT. An important feature of these potentials is a novelsemi-local regularization approach that combines the advantages of a localregulator for long-range interactions with the convenience of anangle-independent nonlocal regulator for contact interactions. The authorsdiscuss the key features of the semi-local two-nucleon potentials anddemonstrate their outstanding performance in the two-nucleon sector by showingselected results up to fifth order in the EFT expansion. Also reviewed areapplications to heavier systems, which are currently limited to third chiralorder. This limitation reflects the conceptual difficulty in constructing aconsistently regularized many-body forces and current operators and affects allcurrently available interactions. The authors outline possible ways to tacklethis problem and discuss future directions in the field.

Semi-local nuclear forces from chiral EFT: State-of-the-art & challenges