The problem of cold nuclear fusion LENR cannot be solved in principle within the framework of the Standard Model, because it describes only the interaction of elementary particles. She, to put it simply, explains how various “dishes” are made from various “ingredients” (6 quarks, 6 leptons, 4 bosons + Higgs boson + antiparticles). But it does not explain at all how and where these ingredients come from, are born and disappear, that is, the non-mechanical movement and change of fermion-baryon matter in the “space” surrounding it, which is the essence of the cold nuclear fusion LENR process.
The nucleus of each and every element an isotope has a specific structure to it. That is the key finding in the Structured Atom Model.
This structure is obviously due to the interaction of the nucleons (only protons and electron I argue). That means that the organization of the elements or structure of the nucleus of those elements, which keeps occurring time and time again automatically, offers us a way into studying the rules of interaction (of the nucleons). So in my mind this would offer us the best approach for further understanding fundamental (nuclear) physics and actually improve on the current standard model which is hopelessly unsatisfying and not able to bring us any further in realistic terms.