Study of the Hyperon-Nucleon Interaction via Final-State Interactions in Exclusive Reactions

TL;DR

This paper introduces a new method to study Hyperon-Nucleon interactions by analyzing final-state interactions in exclusive reactions, using high-statistics data to extract polarization observables and constrain interaction models.

Contribution

It develops a novel approach involving hyperon beams within nuclear systems and detailed polarization measurements to better understand YN interactions.

Findings

Access to detailed YN interaction data achieved.

Polarization observables constrain interaction models.

Kinematic regimes dominated by YN interactions identified.

Abstract

A novel approach that allows access to long-sought information on the Hyperon-Nucleon (YN) interaction was developed by producing a hyperon beam within a few-body nuclear system, and studying final-state interactions. The determination of polarisation observables, and specifically the beam spin asymmetry, in exclusive reactions allows a detailed study of the various final-state interactions and provides us with the tools needed to isolate kinematic regimes where the YN interaction dominates. High-statistics data collected using the CLAS detector housed in Hall-B of the Thomas Jefferson laboratory allows us to obtain a large set of polarisation observables and place stringent constraints on the underlying dynamics of the YN interaction.