New approaches to nuclear forces

Abstract:  This talk concerns several recent approaches using effective field theory (EFT) to describe nuclear system. First, on the nucleon-nucleon (NN) interaction level, to resolve the issue of the conventional chiral EFT approach (Weinberg power counting), a new power counting which is free of the renormalization group problem is introduced. Then we propose a new way to apply the EFT interaction in truncated model space to perform ab-initio calculations. Finally, recent approaches toward a systematic treatment of effective interactions within the energy density function (EDF) framework will be discussed. Results of nuclear matter up to NLO based on this approach will be presented.