Composite nature of Lambda(1405) from the spacial structure of KbarN system

TL;DR

This paper investigates the internal structure of the Lambda(1405) resonance, revealing it as a meson-baryon molecular state through solving the Schrödinger equation with a carefully constructed local potential.

Contribution

It introduces a new local potential for the KbarN system that aligns with experimental data and complex energy considerations, providing insights into the resonance's composite nature.

Findings

Lambda(1405) is a meson-baryon molecular state

The local potential accurately reproduces experimental constraints

The spatial structure supports a composite state hypothesis

Abstract

We discuss the spacial structure of the resonance state, Lambda(1405), solving the Schrodinger equation with the KbarN local potential. The potential is constructed by paying attention to the two points, the constraint from the recent experimental data and the reliability in the complex energy region. Using the new local potential, we investigate the KbarN spacial structure and obtain the result indicating that Lambda(1405) is the meson-baryon molecular state, that is, the composite state.