A pentaquark picture of Lambda(1405)

TL;DR

This paper investigates the Lambda(1405) hyperon as a pentaquark state using a relativistic quark model, analyzing decay rates and highlighting model dependence.

Contribution

It introduces a relativistic pentaquark model for Lambda(1405) and examines its decay properties, emphasizing the sensitivity to model assumptions.

Findings

Decay rate is highly model-dependent.

Relativistic effects are significant in the pentaquark picture.

The model provides insights into the structure of Lambda(1405).

Abstract

We test a pentaquark model of the negative parity hyperon Lambda(1405). We use a model where valence four quarks and one antiquark move in a potential relativistically and interact with each other and themselves through gluon and NG boson. Fall-apart decay rate of the system is studied and strong model dependence is pointed out.