$K^0\Lambda$ photoproduction off the neutron with nucleon resonances

TL;DR

This paper studies kaon photoproduction off the neutron, analyzing the influence of nucleon resonances on cross sections and beam asymmetry, and compares results with recent experimental data.

Contribution

It introduces a combined effective Lagrangian and Regge approach with resonance couplings constrained by quark models for neutron targets.

Findings

Qualitative agreement with CLAS and FOREST data

Resonance $N(1685,1/2^+)$ significantly affects near-threshold cross sections

Predicted beam asymmetry results for future validation

Abstract

We investigate kaon photoproduction off the neutron target, i.e., $\gamma n \to K^0 \Lambda$, focusing on the role of nucleon resonances given in the Review of Particle Data Group in the range of $\sqrt{s} \approx 1600 - 2200$ MeV. We employ an effective Lagrangian method and a Regge approach. The strong couplings of nucleon resonances with $K\Lambda$ vertices are constrained by quark model predictions. The numerical results of the total and differential cross sections are found to be in qualitative agreement with the recent CLAS and FOREST experimental data. We discuss the effects of the narrow nucleon resonance $N(1685,1/2^+)$ on both the total and differential cross sections near the threshold energy. In addition, we present the results of the beam asymmetry as a prediction.