phi puzzle in heavy-ion collisions at 2 A GeV: how many K- from phi decays?

  title={phi puzzle in heavy-ion collisions at 2 A GeV: how many K- from phi decays?},
  author={Burkhard Kampfer and Roland Kotte and C. Hartnack and J{\"o}rg Aichelin},
  journal={Journal of Physics G},
The preliminary experimental data on production in the reaction Ni(1.93 A GeV) + Ni point to a puzzling high yield, which cannot be reproduced with present transport codes. We survey the experimental situation and present prospects for dedicated measurements of the multiplicities with the K+K? and e+e? channels at HADES and FOPI. 
Calculations of K± and ϕ production in near-threshold proton-nucleus collisions
K± and ϕ meson production in proton-nucleus (pA) collisions has been calculated within a BUU transport model. It is shown that the nucleon-hyperon strangeness transfer channel is essential. The role
Catalytic reactions in heavy-ion collisions
We discuss a new type of reactions of a ϕ-meson production on hyperons, πY → ϕY and antikaons -KN → ϕY. These reactions are not suppressed according to Okubo-Zweig-Iizuka rule and can be a new
Strange hadron production at SIS energies: an update from HADES
We present and discuss recent experimental activities of the HADES collaboration on open and hidden strangeness production close or below the elementary NN threshold. Special emphasis is put on the
What can we learn from the subthreshold phi(1020) production
Strange particles are sensitive probes of hot and dense nuclear matter formed in the relativistic nucleus - nucleus collisions. In our experimental studies performed at SIS18 (GSI Darmstadt) with the
Catalytic phi meson production in heavy-ion collisions
The phi meson production on hyperons, pi Y --> phi Y and anti-kaons bar-K N--> phi Y is argued to be a new efficient source of phi mesons in a nucleus-nucleus collision. These reactions are not
Tagging the reaction pn → dϕ by backward protons in pd → dϕpsp processes
The reaction pd → dpsp is studied within the Bethe–Salpeter formalism. Under special kinematical conditions (slow backward spectator proton psp and fast forward deuteron) relevant for forthcoming
Absorption of ϕ mesons in near-threshold proton-nucleus reactions
In the framework of the nuclear-spectral-function approach for incoherent primary proton-nucleon and secondary pion-nucleon production processes, we study the inclusive ϕ-meson production in the


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?
Abstract:The ratio of K- to K+-meson yields has been measured in the systems 96Ru + 96Ru at 1.69 A GeV, 96Ru+96Zr at 1.69 A GeV, and 58Ni+58Ni at 1.93 A GeV incident beam kinetic energy. The yield
Polarization observables in the reaction $NN \to NN \Phi$
We study the reaction $NN \to NN \Phi$ slightly above the threshold within an extended one-boson exchange model which also accounts for $uud$ knock-out. It is shown that polarization observables,
Kaon production at subthreshold and threshold energies
We summarize what we have learnt about kaon production in nucleus-nucleus collisions over the previous decade. We will address three questions. (a) Is the K+ production sensitive to the nuclear
Stopping and radial flow in central 58Ni+58Ni collisions between 1A and 2A GeV
The production of charged pions, protons. and deuterons has been studied in central collisions of Ni-58 on Ni-58 at incident beam energies of 1.06A, 1.45A, and 1.93A GeV. The dependence of
Production of φ mesons in near-threshold π
We analyze the production of $\phi$ mesons in $\pi N$ and NN reactions in the near-threshold region, using throughout the conventional ``non-strange'' dynamics based on such processes which are
Modelling the many-body dynamics of heavy ion collisions: Present status and future perspective
Abstract: Basic problems of the semiclassical microscopic modelling of strongly interacting systems are discussed within the framework of Quantum Molecular Dynamics (QMD). This model allows to study