Electroproduction of Λ(1405)

The electroproduction of K+ Λ(1405) was studied by analyzing the E1F data set collected in Hall B at Jefferson Lab. The analysis utilized the decay channel Σ+ π- of the Λ(1405) and pπ0 of the Σ+. Simulations of background, Λ(1405) and Λ(1520) production according to PDG values were performed by using standard CLAS analysis tools adapted for the E1F run. Fits of the acceptance-corrected simulations were made to the acceptance-corrected data to determine contributions from signal and background processes. The line shape of Λ(1405) varies with the four momentum transfer, Q2, and does not match the line shape based on PDG resonance parameters. It corresponds approximately to predictions of a recent two-pole meson-baryon picture of this state.