Properties of the Lambda(1405) Measured at CLAS

TL;DR

This study presents high-statistics measurements of Lambda(1405) photoproduction at Jefferson Lab, analyzing its mass distribution and cross sections to better understand its complex nature and dynamical components.

Contribution

First high-statistics measurement of Lambda(1405) photoproduction using CLAS, providing detailed invariant mass and cross section data to explore its structure.

Findings

Measured invariant mass distributions in Sigma pi decay modes

Determined differential cross sections dsigma/dt

Indicated potential dynamical components of Lambda(1405)

Abstract

Using the CLAS detector system in Hall B at Jefferson Lab, we have done a high statistics measurement of the photoproduction of K+ Lambda(1405) using a proton target. The reconstructed invariant mass seen in the various Sigma pi decay modes has been measured, as well as the differential cross section dsigma/dt. The nature of the Lambda(1405) with its peculiar mass distribution is not well understood, and studies have shown that it may posess strong dynamical components, which could be extracted from our data. Various aspects of our analysis are discussed, as well as future prospects to further enhance the precision of the results.