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Inclusive Λ production in proton-proton collisions at 3.5 GeV

J. Adamczewski-Musch et al. (HADES Collaboration)

The inclusive production of Λ hyperons in proton-proton collisions at s=3.18GeV 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 accounts for the abundant pK+Λ final state. Model and data show a reasonable agreement at midrapidities, while a difference is found for larger rapidities. A total Λ production cross section in p+p collisions at s=3.18GeV of σ(p+pΛ+X)=207.3±1.3+6.07.3(stat.)±8.4(syst.)+0.40.5(model.)μb is found.

Voir en ligne : Phys. Rev. C 95, 015207 – Published 27 January 2017



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