Investigation of the Lambda(1405) line shape observed in pp collisions

In this work we investigate different possible explanations for the observed low mass {\Lambda}(1405) signal associated to the production of the {\Lambda}(1405) in p+p reactions at 3.5 GeV beam kinetic energy measured by the HADES collaboration. We study the influence of interference effects between the {\Lambda}(1405) resonance and the non-resonant background. Furthermore, we present a phenomenological method to use the HADES data for determining the relative contribution of the two {\Lambda}(1405) poles and discuss to which extent the data can constrain the position of these poles in the complex energy plane.
Comment: 8 pages 7 figures, journal: accepted by PRC