arXiv subjects

Johannes Siebenson

Publications and source records attributed to Johannes Siebenson.

2 recordsLinked to original sources

arXiv2013

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

In this work we investigate different possible explanations for the observed low mass Λ(1405) signal associated to the production of the Λ(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 Λ(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 Λ(1405) poles and discuss to which extent the data can constrain the position of these poles in the complex energy plane.

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arXiv2010

Measurement of the Lambda(1405) in proton proton reactions with HADES

We present an analysis of the Lambda(1405) resonance in p+p reactions at a kinetic beam energy of 3.5 GeV, measured by the High Acceptance Di-Electron Spectrometer (HADES). The resonance is reconstructed in the two charged decay channels Sigma^(+/-) pi^(-/+), with help of a kinematic refit, which improves the mass resolution. The high misidentification of pions and protons as kaons required the development of a sophisticated sideband analysis, which can describe the misidentification background quite well.

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