Dynamics of strangeness and collective flows in heavy-ion collisions near threshold energies

Abstract

Strangeness (K${}^{0,+}$, $\Lambda$ and ${\Sigma }^{-,0,+}$) production in heavy-ion collisions near threshold energies has been investigated within the Lanzhou quantum molecular dynamics (LQMD) transport model. The kaon (anti-kaon)-nucleon and hyperon-nucleon potentials in dense nuclear matter are implemented in the model, which are computed from the chiral perturbation approach and the relativistic mean-field model, respectively. It is found that the in-medium potentials change the structure of transverse flow, and also affect the rapidity distributions and the inclusive spectra for strangeness production. The local temperature of the fire ball extracted from the kaon spectra of inclusive invariant cross sections is influenced by the kaon-nucleon potential. The stiffness of nuclear symmetry energy and the kaon-nucleon potential by distinguishing isospin effect play a significant role on the ratio of K${}^0$/K${}^{+}$, in particular at the subthreshold energies. The ratio of ${\Sigma }^{-}/{\Sigma }^{+}$ depends on the high-density symmetry energy, in which the $\Sigma$-nucleon potential has a neglectable contribution on the isospin ratio.

25 pages, 13 figures. arXiv admin note: text overlap with arXiv:1304.2897

References in corpus (16)

• In-medium nuclear interactions of low-energy hadrons
• Strangeness Production close to Threshold in Proton-Nucleus and Heavy-Ion Collisions
• Isospin effects on sub-threshold kaon production at intermediate energies
• Production of K+ and of K- Mesons in Heavy-Ion Collisions from 0.6 to 2.0 AGeV Incident Energy
• Momentum dependence of the symmetry potential and its influence on nuclear reactions
• Nuclear in-medium effects and collective flows in heavy-ion collisions at intermediate energies
• Dynamical analysis on heavy-ion fusion reactions near Coulomb barrier
• Transverse emission of isospin ratios as a probe of high-density symmetry energy in isotopic nuclear reactions
• Effective mass splitting of neutron and proton and isospin emission in heavy-ion collisions
• K^0 and Λproduction in Ni + Ni collisions near threshold
• Constraining the high-density behavior of nuclear equation of state from strangeness production in heavy-ion collisions
• Dynamics of pion production in heavy-ion collisions around 1A GeV energies
• Pion Production in Heavy-ion Collisions in the 1 A GeV region
• Fusion dynamics of symmetric systems near barrier energies
• Nuclear in-medium and isospin effects on subthreshold kaon production in heavy-ion collisions
• Dynamics of strangeness production in heavy-ion collisions near threshold energies

Cited by in corpus (21)

• Nuclear dynamics and particle production near threshold energies in heavy-ion collisions
• In-medium and isospin effects on particle production near threshold energies in heavy-ion collisions
• Probing high-density nuclear symmetry energy with ${\Xi }^{-}/{\Xi }^0$ ratio in heavy-ion collisions at $\sqrt{s_{NN}}\sim 3$ GeV
• Isospin dynamics on neck fragmentation in isotopic nuclear reactions
• Formation and dynamics of exotic hypernuclei in heavy-ion collisions
• Energy-Dependence of Nucleus-Nucleus Potential and Friction Parameter in Fusion Reactions
• Particle production in antiproton induced nuclear reactions
• The effect of Lorentz-like force on collective flows of K${}^{+}$ in Au+Au collisions at 1.5 GeV/nucleon}{The effect of Lorentz-like force on collective flows of $K^{+}$ in Au+Au collisions at 1.5 GeV/nucleon
• Correlation of the hyperon potential stiffness with hyperon constituents in neutron stars and heavy-ion collisions
• Production of fragments and hyperfragments in antiproton-nucleus collisions
• Hyperon Dynamics in Heavy-ion Collisions near threshold energy
• Preequilibrium particle emissions and in-medium effects on the pion production in heavy-ion collisions
• Medium effects in $\Lambda K^{+}$ pair production by 2.83 GeV protons on nuclei
• Isospin splitting of nucleon effective mass and symmetry energy in isotopic nuclear reactions
• Strangeness and hypernuclear production in fragmentation reactions induced by antikaons
• Dynamics of light hypernuclei in collisions of ${}^{197}$Au+${}^{197}$Au at GeV energies
• Strangeness production and hypernuclear formation in proton and antiproton induced reactions
• Nuclear fragmentation induced by low-energy antiprotons within a microscopic transport approach
• High-density symmetry energy from subthreshold hyperon production in heavy-ion collisions
• Antiproton production in heavy-ion collisions at subthreshold energies
• Transport Model Comparison Studies of Intermediate-Energy Heavy-Ion Collisions