Few-Body Systems and the Pionless Effective Field Theory

TL;DR

This paper reviews recent advances in the application of pionless effective field theory to few-body systems, highlighting its success in describing three- and four-body interactions with large scattering lengths across atomic, nuclear, and particle physics.

Contribution

It provides an overview of recent calculations using pionless EFT, emphasizing developments in three- and four-body systems and their diverse physical applications.

Findings

Successful description of few-body systems with large scattering lengths

Advances in three- and four-body sector calculations

Broad applicability across physics domains

Abstract

The pionless effective field theory (EFT) is the appropriate low-energy EFT for short-range interactions that display a large scattering length. It has been successfully applied in atomic, nuclear and particle physics. We give an overview over recent calculations employing the pionless effective field theory and lay emphasis on applications in the three- and four-body sector where the most exciting developments have occurred.