Deep sub-threshold ${\Xi }^{-}$ production in Ar+KCl reactions at 1.76A GeV

Abstract

We report first results on a deep sub-threshold production of the doubly strange hyperon ${\Xi }^{-}$ in a heavy-ion reaction. At a beam energy of 1.76A GeV the reaction Ar+KCl was studied with the High Acceptance Di-Electron Spectrometer (HADES) at SIS18/GSI. A high-statistics and high-purity $\Lambda$ sample was collected, allowing for the investigation of the decay channel ${\Xi }^{-}\to \Lambda {\pi }^{-}$. The deduced ${\Xi }^{-}/(\Lambda +{\Sigma }^0)$ production ratio of $(5.6\pm 1.2_{-1.7}^{+1.8})\cdot 10^{-3}$ is significantly larger than available model predictions.

4 pages, including 4 figures

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Cited by in corpus (45)

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• Dielectron production in Ar+KCl collisions at 1.76A GeV
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• Sub-threshold $\varphi$ and ${\Xi }^{-}$ production by high mass resonances with UrQMD
• Contributions of hyperon-hyperon scattering to subthreshold cascade production in heavy ion collisions
• Deep sub-threshold $\Xi$ and $\Lambda$ production in nuclear collisions with the UrQMD transport model
• Strange hadron production in heavy ion collisions from SPS to RHIC
• Lambda hyperon production and polarization in collisions of p(3.5 GeV) + Nb
• Measurements of Ks, Lambda and Xi from Au+Au collisions at \sqrt{s_NN} = 7.7, 11.5 and 39 GeV in STAR
• D meson nuclear modification factors in Pb-Pb collisions at $\sqrt{s_{NN}}$ = 2.76 TeV measured with the ALICE detector at the CERN-LHC
• Probing Strangeness Canonical Ensemble with $K^{-}$, $\varphi (1020)$ and ${\Xi }^{-}$ Production in Au+Au Collisions at $\sqrt{s_{\mathrm{NN}}}=3\mathrm{GeV}$
• Probing high-density nuclear symmetry energy with ${\Xi }^{-}/{\Xi }^0$ ratio in heavy-ion collisions at $\sqrt{s_{NN}}\sim 3$ GeV
• Subthreshold Xi- Production in Collisions of p(3.5 GeV)+Nb
• Why $\Xi (1690)$ and $\Xi (2120)$ are so narrow?
• Double strangeness ${\Xi }^{-}$ production as a probe of nuclear equation of state at high densities
• Production and electromagnetic decay of hyperons: a feasibility study with HADES as a Phase-0 experiment at FAIR
• Strangeness production via resonances in heavy-ion collisions at SIS energies
• Strangeness Balance in HADES Experiments and the Xi- Enhancement
• Identical pion intensity interferometry in central Au+Au collisions at 1.23A GeV
• Comparison of heavy ion transport simulations: Ag+Ag collisions at Elab = 1.58 AGeV
• Heavy baryonic resonances, multistrange hadrons, and equilibration at energies available at the GSI Schwerionensynchrotron, SIS18
• Role of phi decays for K- yields in relativistic heavy-ion collisions
• Search for the QCD Critical Point by Higher Moments of Net-proton Multiplicity Distributions at RHIC
• Particle Production in AgAg Collisions at $E_{\mathrm{Kin}}=1.58A$ GeV within a Hadronic Transport Approach
• Lambda-p femtoscopy in collisions of Ar+KCl at 1.76 AGeV
• Influence of anisotropic $\Lambda /\Sigma$ creation on the ${\Xi }^{-}$ mutiplicity in subthreshold proton-nucleus collisions
• Open heavy flavor at RHIC and LHC in a partonic transport model
• A method for probing the formation of quark matter
• Correlated pion-proton pair emission off hot and dense QCD matter
• Complete Strangeness Measurements in Heavy-Ion Collisions
• Probe the QCD phase diagram with phi-meson production in relativistic nuclear collisions at STAR
• Open Questions in the Understanding of Strangeness Production in HIC -- Experiment Perspective
• Leptonic decay of $\varphi$(1020) meson measured with the STAR experiment
• Medium effects in antikaon-induced ${\Xi }^{-}$ hyperon production on nuclei near threshold
• SQM2016: Theory Summary
• Strange Baryonic Resonances and Resonances Coupling to Strange Hadrons at SIS Energies
• The QCD Critical End Point in the Context of the Polyakov--Nambu--Jona-Lasinio Model
• J/$\psi$ polarization in p+p collisions at $\sqrt{s}$ = 200 GeV in STAR
• Strangeness Production at SIS measured with HADES
• Production of multi-strange baryons in 7 TeV proton-proton collisions with ALICE
• Probing resonance matter with virtual photons
• Energy dependence of elliptic flow of $\varphi$-meson in STAR at RHIC
• Exclusive open strangeness production in the $pp\to pp{K}^{+}{K}^{-}$ reaction at high energies and a measurement of scalar ${\chi }_{c0}$ meson
• Reference calculations for subthreshold $\Xi$ production