Antikaon-nucleon dynamics and its application to few-body systems

TL;DR

This paper reviews recent advances in understanding antikaon interactions with nucleons and nuclei, highlighting the emergence of the Lambda(1405) resonance, updated Kbar N interactions, and potential antikaon bound states in nuclei.

Contribution

It provides a comprehensive overview of antikaon-nucleon dynamics using chiral SU(3) symmetry, including new insights into the Lambda(1405) resonance and bound state possibilities.

Findings

Lambda(1405) arises from coupled-channel interactions

Updated Kbar N interaction models match recent kaonic hydrogen data

Potential existence of antikaon bound states in nuclei

Abstract

We overview the recent progress in the investigation of the antikaon dynamics with single nucleon and with few-body nuclei, based on chiral SU(3) symmetry. We first show how the Lambda(1405) resonance emerges from the coupled-channel Kbar N-pi Sigma interaction. Next, we present the construction of an up-to-date Kbar N interaction in response to the recent measurement of kaonic hydrogen. Finally, we discuss the possibility of the antikaon bound states in nuclei from the perspective of few-body physics.