  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.
