Inclusion of $K\Lambda$ electroproduction data in a coupled channel analysis

TL;DR

This paper extends a coupled-channel analysis framework to include $K\Lambda$ electroproduction data, enhancing the understanding of baryon structures through analysis of differential cross sections and polarization observables.

Contribution

The study introduces the inclusion of $K\\Lambda$ electroproduction data into the J"ulich-Bonn-Washington analysis, expanding previous models to better extract baryon properties.

Findings

Polarization observables are predicted and compared with CLAS data.

The inclusion of $K\\Lambda$ data improves baryon property determination.

The extended analysis underscores the importance of polarization data.

Abstract

Exclusive electroproduction reactions provide an access to the structure of excited baryons. To extract electroproduction multipoles encoding this information, the J\"ulich-Bonn-Washington (JBW) analysis framework is extended to the analysis of differential cross sections in $K\Lambda$ electroproduction. This update enlarges the scope of previous coupled-channel analyses of pions and eta mesons, with photoproduction reactions as boundary condition in all analyzed electroproduction reactions. Polarization observables are predicted and compared to recent CLAS data. The comparison shows the relevance of these data to pin down baryon properties.