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Hadron Production and Propagation in Pion-Induced Reactions on Nuclei

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arxiv 2301.03940 v2 pith:QC3ZV74T submitted 2023-01-10 nucl-ex

R. Abou Yassine , J. Adamczewski-Musch , O. Arnold , E.T. Atomssa , M. Becker , C. Behnke , J.C. Berger-Chen , A. Blanco
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keywords productiondatahadronmathrmcollisionscomparedinvestigatedlambda
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abstract

Hadron production ($\pi^\pm$, proton, $\Lambda$, $K_S^0$, $K^\pm$) in $\pi^- + \mathrm{C}$ and $\pi^- + \mathrm{W}$ collisions is investigated at an incident pion beam momentum of $1.7~\mathrm{GeV}/c$. This comprehensive set of data measured with HADES at SIS18/GSI significantly extends the existing world data on hadron production in pion induced reactions and provides a new reference for models that are commonly used for the interpretation of heavy-ion collisions. The measured inclusive differential production cross-sections are compared with state-of-the-art transport model (GiBUU, SMASH) calculations. The (semi-) exclusive channel $\pi^- + A \rightarrow \Lambda + K_S^0 +X$, in which the kinematics of the strange hadrons are correlated, is also investigated and compared to a model calculation. Agreement and remaining tensions between data and the current version of the considered transport models are discussed.

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