Accurate Relativistic Chiral Nucleon-Nucleon Interaction up to

We construct a relativistic chiral nucleon-nucleon interaction up to the next-to-next-to-leading order in covariant baryon chiral perturbation theory. We show that a good description of the np phase shifts up to Tlab = 200 MeV and even higher can be achieved with a chi similar to 2/d.o.f. less than 1. Both the next-to-leadingorder results and the next-to-next-to-leading-order results describe the phase shifts equally well up to Tlab = 200 MeV, but for higher energies, the latter behaves better, showing satisfactory convergence. The relativistic chiral potential provides the most essential inputs for relativistic ab initio studies of nuclear structure and reactions, which has been in need for almost two decades.

Automated summary

We propose a theoretical framework for a relativistic chiral nucleon-nucleon interaction and demonstrate its good performance in describing phase shifts up to Tlab = 200MeV. This theory has significant applications in studying nuclear structure and reactions.