Inclusive Λ production in proton-proton collisions at 3.5 GeV

J. Adamczewski-Musch, G. Agakishiev, O. Arnold, E. T. Atomssa, C. Behnke, J. C. Berger-Chen, J. Biernat, A. Blanco, C. Blume, M. Böhmer, P. Bordalo, S. Chernenko (+97 others)
2017 Physical Review C  
The inclusive production of Λ hyperons in proton-proton collisions at √(s) = 3.18 GeV was measured with HADES at the GSI Helmholtzzentrum für Schwerionenforschung in Darmstadt. The experimental data are compared to a data-based model for individual exclusive Λ production channels in the same reaction. The contributions of intermediate resonances such as Σ(1385), Δ++ or N* are considered in detail. In particular, the result of a partial wave analysis is accounted for the abundant pK^+Λ final
more » ... e. Model and data show a reasonable agreement at mid rapidities, while a difference is found for larger rapidities. A total Λ production cross section in p+p collisions at √(s) = 3.18 GeV of σ(pp → Λ + X) = 207.3 ± 1.3 +6.0 -7.3 (stat.) ± 8.4 (syst.) +0.4 -0.5 (model) μb is found.
doi:10.1103/physrevc.95.015207 fatcat:3kedkzt3o5azvaawt3dmn2m4iu