Radiative decay of $K^-p$ system and photoproduction of $\Lambda(1405)$

TL;DR

This paper investigates the properties and production mechanisms of the $ ext{Lambda}(1405)$ resonance through radiative decay and photoproduction processes, providing theoretical predictions for cross sections based on experimental data.

Contribution

It introduces a comprehensive analysis of $ ext{Lambda}(1405)$ properties using the isobar model, incorporating the $K_1(1270)$ meson for consistency with experimental branching ratios.

Findings

Coupling constants of $ ext{Lambda}(1405)$ are extracted from decay data.

Predicted total and differential cross sections for $ ext{Lambda}(1405)$ photoproduction.

Analysis aligns with recent experimental measurements.

Abstract

The properties of the $\Lambda(1405)$ resonance have been investigated from radiative decay of $K^- p\to Y\gamma$ and photoproduction $\gamma p\to K^+\Lambda(1405)$ within the framework of the isobar model. For a consistent result with recently measured branching ratios, the axial vector meson $K_1(1270)$ is taken into account. Strong and electromagnetic coupling constants of $\Lambda(1405)$ are extracted from these branching ratios and are applied to the analysis of $K^+\Lambda(1405)$ photoproduction. The total and differential cross sections are predicted.