Kaon photoproduction on the nucleon with constrained parameters

TL;DR

This paper analyzes kaon photoproduction on nucleons using a multipoles model with resonance decay widths constrained to PDG values, revealing significant impacts on resonance conclusions compared to previous models.

Contribution

It introduces a multipoles model with PDG-constrained resonance decay widths, providing a new perspective on resonance contributions in kaon photoproduction.

Findings

Resonance decay widths constrained to PDG values alter resonance significance.

The analysis challenges previous conclusions about key resonances.

Constrained parameters lead to different interpretations of experimental data.

Abstract

The new experimental data of kaon photoproduction on the nucleon, gamma p -> K+ Lambda, have been analyzed by means of a multipoles model. Different from the previous models, in this analysis the resonance decay widths are constrained to the values given by the Particle Data Group (PDG). The result indicates that constraining these parameters to the PDG values could dramatically change the conclusion of the important resonances in this reaction found in the previous studies.