Introduction - Strong interaction in the nuclear medium: new trends

TL;DR

Recent advances in nuclear force theories, especially chiral effective field theories, are transforming low energy nuclear physics by enabling direct QCD-based descriptions and improving ab initio methods for nuclear systems.

Contribution

This paper summarizes new trends in strong nuclear interactions, highlighting developments from quark-level theories to ab initio approaches and their implications for nuclear physics.

Findings

Progress in chiral perturbation and effective field theories.

Development of ab initio methods starting from nucleon-nucleon interactions.

Insights into three-body forces and future perspectives for nuclear models.

Abstract

Recent achievements in nuclear forces theory open new perspectives for the next decade of low energy nuclear physics, bringing together people from very different communities. Although many developments remain to be done, the possibility to directly use QCD to describe nuclear system is a major challenge that is within reach. In this introduction to the 2009 International Joliot-Curie School (EJC2009), new trends in the strong nuclear interaction are summarized starting from quarks and ending with finite or infinite nuclear systems. At different energy scales, selected new concepts and ideas have been discussed in a rather simple way. Recent advances in the theory of nuclear forces, thanks to chiral perturbation and effective field theories, have led to a new generation of strong nuclear interaction particularly suited to low energy nuclear physics. The interesting aspects of new interactions compared to conventional forces are underlined. Recent achievements in ab initio theories that directly start from the bare nucleon-nucleon interaction and their key role to understand the three-body force are illustrated. Finally, future perspectives for standard nuclear physics theories, namely Shell Model and Energy Density Functional, are discussed.