Contribution of higher nucleon resonances to K*{\Lambda} photoproduction

TL;DR

This study examines how higher nucleon resonances, specifically D13(2080) and D15(2200), influence K*{ extLambda} photoproduction, highlighting the importance of D13(2080) in matching experimental data.

Contribution

It introduces the inclusion of higher nucleon resonances D13(2080) and D15(2200) into the effective Lagrangian model for K*{ extLambda} photoproduction, showing their impact on reaction rates.

Findings

D13(2080) significantly enhances near-threshold production rates.

D15(2200) has a minor contribution.

Model predictions agree well with experimental data.

Abstract

We investigate K*{\Lambda}(1116) photoproduction off the proton and neutron targets in the effective Lagrangian method in the tree-level Born approximation. In addition to the K, K*, and {\kappa} exchanges which are the main contributions to the reaction, we consider the contributions from the higher nucleon resonances D13(2080) and the D15(2200). We find that the D13(2080) plays a crucial role in explaining the enhancement of the near-threshold production rate, which results in a good agreement with the experimental data for the proton targets, while the contribution of the D15(2200) is rather small. A similar conclusion is drawn for K* photoproduction off the neutron targets. In addition to the energy and angular dependence of the cross sections, we present the predictions on the photon-beam asymmetry.