Sub-threshold production of K^{0}_{s} mesons and Λ hyperons in Au(1.23A GeV)+Au

Abstract

We present first data on sub-threshold production of K0 s mesons and Λ 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.

8 pages, 10 figures

References in corpus (8)

• Big-Bang Nucleosynthesis
• Systematics of pion emission in heavy ion collisions in the 1A GeV regime
• Enhancement of hyperon production at central rapidity in 158 A GeV/c Pb-Pb collisions
• Meson-nucleus potentials and the search for meson-nucleus bound states
• Production of K+ and of K- Mesons in Heavy-Ion Collisions from 0.6 to 2.0 AGeV Incident Energy
• K^0 and Λproduction in Ni + Ni collisions near threshold
• Measurement of the in-medium K0 inclusive cross section in pi- -induced reactions at 1.15 GeV/c
• Medium effects in proton-induced $K^0$ production at 3.5 GeV

Cited by in corpus (16)

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• Probing Strangeness Canonical Ensemble with $K^{-}$, $\varphi (1020)$ and ${\Xi }^{-}$ Production in Au+Au Collisions at $\sqrt{s_{\mathrm{NN}}}=3\mathrm{GeV}$
• Sub-threshold $J/\psi$ and ${\rm Y}$ Production in $\gamma A$ Collisions
• Statistical hadronization model for heavy-ion collisions in a few GeV energy regime
• Ambiguities in the hadro-chemical freeze-out of Au+Au collisions at SIS18 energies and how to resolve them
• Dilepton production in microscopic transport theory with in-medium $\rho$-meson spectral function
• Decoding the flow evolution in Au+Au reactions at $1.23A$ GeV using hadron flow correlations and dileptons
• Particle Production in AgAg Collisions at $E_{\mathrm{Kin}}=1.58A$ GeV within a Hadronic Transport Approach
• Simultaneous description of high density QCD matter in heavy ion collisions and neutron star observations
• Correlated pion-proton pair emission off hot and dense QCD matter
• Spheroidal expansion and freeze-out geometry of heavy-ion collisions in the few-GeV energy regime
• Systematics of yields of strange hadrons from heavy-ion collisions around threshold energies
• Kaon production in the HADES experiment in Au+Au collisions at $\sqrt{s_{\mathrm{NN}}}=2.4$ GeV
• Strange Hadron Production at High Baryon Density