K^0 and Λproduction in Ni + Ni collisions near threshold

Abstract

New results concerning the production of neutral strange particles, $K^0$ and $\Lambda$ in Ni + Ni collisions at 1.93$A$ GeV, measured with the FOPI detector at GSI-Darmstadt, are presented. Rapidity density distributions and Boltzmann slope parameter distributions are measured in nearly the full phase space of the reaction. The observables are compared to existing $K^{+}$ and proton data. While the $K^0$ data agree with previously reported $K^{+}$ measurements, the $\Lambda$ distributions show a different behavior relative to that of protons. The strangeness balance and the production yield per participating nucleon as a function of the centrality of the reaction are discussed, for the first time at SIS energies.

10 pages, 8 figures

References in corpus (25)

• Thermal phenomenology of hadrons from 200 AGeV S+S collisions
• Transverse momentum analysis of collective motion in relativistic nuclear collisions
• Modelling the many-body dynamics of heavy ion collisions: Present status and future perspective
• Kaon production in heavy ion reactions at intermediate energies
• Evidence for a Soft Nuclear Equation-of-State from Kaon Production in Heavy Ion Collisions
• Kaons in dense matter, kaon production in heavy-ion collisions, and kaon condensation in neutron stars
• Medium effects in high energy heavy-ion collisions
• Production of K+ and of K- Mesons in Heavy-Ion Collisions from 0.6 to 2.0 AGeV Incident Energy
• Sideward flow of K+ mesons in Ru+Ru and Ni+Ni reactions near threshold
• First Measurement of Antikaon Phase-Space Distributions in Nucleus-Nucleus Collisions at Subthreshold Beam Energies
• Comparison of Lambda and Sigma(0) Threshold Production in Proton-Proton Collisions
• Subthreshold kaon production and the nuclear equation of state
• Transition from in-plane to out-of-plane azimuthal enhancement in Au+Au collisions
• K^+ production in the reaction ${}^{58}Ni{+}^{58}Ni$ at incident energies from 1 to 2 AGeV
• Stopping and Radial Flow in Central 58Ni + 58Ni Collisions between 1 and 2 AGeV
• Properties of Hadrons in the Nuclear Medium
• First evidence for different freeze-out conditions for kaons and antikaons observed in heavy-ion collisions
• Near-threshold production of the multi-strange ${\Xi }^{-}$ hyperon
• Direct comparison of phase-space distributions of K- and K+ mesons in heavy-ion collisions at SIS energies - evidence for in-medium modifications of kaons ?
• Directed Flow of $\Lambda$-Hyperons in 2-6 AGeV Au+Au Collisions
• Anti-flow of K${}_s^0$ Mesons in 6 AGeV Au + Au Collisions
• Origin of subthreshold K^+ production in heavy ion collisions
• Threshold hyperon production in proton-proton collisions at COSY-11
• Lambda collective flow in heavy ion reactions
• Lambda Hyperons in 2 A*GeV Ni + Cu Collisions

Cited by in corpus (26)

• Strangeness in Nuclei and Neutron Stars
• Strangeness Production close to Threshold in Proton-Nucleus and Heavy-Ion Collisions
• Hyperon production in Ar+KCl collisions at 1.76A GeV
• Deep sub-threshold ${\Xi }^{-}$ production in Ar+KCl reactions at 1.76A GeV
• In-medium effects in strangeness production in heavy-ion collisions at (sub-)threshold energies
• Sub-threshold production of K^{0}_{s} mesons and Λ hyperons in Au(1.23A GeV)+Au
• Lambda hyperon production and polarization in collisions of p(3.5 GeV) + Nb
• Formation of hypernuclei in heavy-ion collisions around the threshold energies
• Dynamics of strangeness and collective flows in heavy-ion collisions near threshold energies
• Constraining the high-density behavior of nuclear equation of state from strangeness production in heavy-ion collisions
• Anisotropic Collective Flow of Lambda Hyperons Produced in C + C Collisions at 4.2 AGeV/c
• Nuclear in-medium and isospin effects on subthreshold kaon production in heavy-ion collisions
• Production of Kaon and $\Lambda$ in nucleus-nucleus collisions at ultra-relativistic energy from a blast wave model
• ${\Sigma }^0$ production in proton nucleus collisions near threshold
• Inclusive Λ production in proton-proton collisions at 3.5 GeV
• Polarization of Lambda^0 hyperons in nucleus-nucleus collisions at high energies
• Dynamics of strangeness production in heavy-ion collisions near threshold energies
• Measurement of $K^{\ast }(892{)}^0$ and $K^0$ mesons in Al+Al collisions at 1.9$A$ GeV
• Simultaneous description of high density QCD matter in heavy ion collisions and neutron star observations
• Centrality dependence of subthreshold $\varphi$ meson production in Ni+Ni collisions at 1.9A GeV
• Wide acceptance measurement of the K${}^{-}$/K${}^{+}$ ratio from Ni+Ni collisions at 1.91A GeV
• 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
• Strangeness Production at SIS measured with HADES
• Hadron Production in Heavy Ion Collisions
• Probing of EoS with clusters and hypernuclei