Sub-threshold production of K⁰_{s} mesons and {Λ} hyperons in Au(1.23A GeV)+Au

HADES collaboration: J. Adamczewski-Musch , O. Arnold , C. Behnke , A. Belounnas , A. Belyaev , J.C. Berger-Chen , J. Biernat , A. Blanco

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C. Blume M. B\"ohmer P. Bordalo S. Chernenko L. Chlad C. Deveaux J. Dreyer A. Dybczak E. Epple L. Fabbietti O. Fateev P. Filip P. Fonte C. Franco J. Friese I. Fr\"ohlich T. Galatyuk J.A. Garzon R. Gernh\"auser M. Golubeva R. Greifenhagen F. Guber M. Gumberidze S. Harabasz T. Heinz T. Hennino S. Hlavac C. H\"ohne R. Holzmann A. Ierusalimov A. Ivashkin B. K\"ampfer T. Karavicheva B. Kardan I. Koenig W. Koenig B.W. Kolb G. Korcyl G. Kornakov R. Kotte A. Kugler T. Kunz A. Kurepin A. Kurilkin P. Kurilkin V. Ladygin R. Lalik K. Lapidus A. Lebedev L. Lopes M. Lorenz T. Mahmoud L. Maier A. Mangiarotti J. Markert S. Maurus V. Metag J. Michel D.M. Mihaylov S. Morozov C. M\"untz R. M\"unzer L. Naumann K.N. Nowakowski M. Palka Y. Parpottas V. Pechenov O. Pechenova O. Petukhov J. Pietraszko W. Przygoda S. Ramos B. Ramstein A. Reshetin P. Rodriguez-Ramos P. Rosier A. Rost A. Sadovsky P. Salabura T. Scheib H. Schuldes E. Schwab F. Scozzi F. Seck P. Sellheim I. Selyuzhenkov J. Siebenson L. Silva Yu.G. Sobolev S. Spataro H. Str\"obele J. Stroth P. Strzempek C. Sturm O. Svoboda M. Szala P. Tlusty M. Traxler H. Tsertos E. Usenko V. Wagner C. Wendisch M.G. Wiebusch J. Wirth Y. Zanevsky P. Zumbruch Y. Leifels

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keywords productionaparthyperonslambdamesonsscalingsub-thresholdcollisions

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We present first data on sub-threshold production of K0 s mesons and {\Lambda} hyperons in Au+Au collisions at $\sqrt{s_{NN}}$ = 2.4 GeV. We observe an universal <Apart> scaling of hadrons containing strangeness, independent of their corresponding production thresholds. Comparing the yields, their <Apart> scaling, and the shapes of the rapidity and the pt spectra to state-of-the-art transport model (UrQMD, HSD, IQMD) predictions, we find that none of the latter can simultaneously describe all observables with reasonable \c{hi}2 values.

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Production of {\Lambda} hyperons in 4.0A GeV and 4.5A GeV carbon-nucleus interactions at the Nuclotron
hep-ex 2026-04 unverdicted novelty 4.0

New measurements of Lambda hyperon yields in 4.0A-4.5A GeV carbon-nucleus collisions at the Nuclotron are presented and compared with transport model predictions.