Isospin dependence of relative yields of $K^{+}$ and $K^0$ mesons at 1.528 AGeV

Abstract

Results on $K^{+}$ and $K^0$ meson production in ${}_{44}^{96}$Ru + ${}_{44}^{96}$Ru and ${}_{40}^{96}$Zr + ${}_{40}^{96}$Zr collisions at a beam kinetic energy of 1.528$A$ GeV, measured with the FOPI detector at GSI-Darmstadt, are investigated as a possible probe of isospin effects in high density nuclear matter. The measured double ratio ($K^{+}/K^0$)${}_{Ru}$/($K^{+}/K^0$)${}_{Zr}$ is compared to the predictions of a thermal model and a Relativistic Mean Field transport model using two different collision scenarios and under different assumptions on the stiffness of the symmetry energy. We find a good agreement with the thermal model prediction and the assumption of a soft symmetry energy for infinite nuclear matter while more realistic transport simulations of the collisions show a similar agreement with the data but also exhibit a reduced sensitivity to the symmetry term.

5 pages, 3 figures. accepted for publication in Phys. Rev. C

References in corpus (3)

• Transverse momentum analysis of collective motion in relativistic nuclear collisions
• Constraints on the high-density nuclear equation of state from the phenomenology of compact stars and heavy-ion collisions
• Isospin effects on sub-threshold kaon production at intermediate energies

Cited by in corpus (13)

• Symmetry energy from elliptic flow in 197Au + 197Au
• Strangeness in Nuclei and Neutron Stars
• Transport approaches for the Description of Intermediate-Energy Heavy-Ion Collisions
• Constraining the high-density nuclear symmetry energy with the transverse-momentum dependent elliptic flow
• In-medium effects in strangeness production in heavy-ion collisions at (sub-)threshold energies
• Measurement of the in-medium K0 inclusive cross section in pi- -induced reactions at 1.15 GeV/c
• Probing the Nuclear Symmetry Energy with Heavy-Ion Reactions Induced by Neutron-Rich Nuclei
• Recent progress constraining the nuclear equation of state from astrophysics and heavy ion reactions
• Density dependence of symmetry free energy of hot nuclei
• Studies of the equation-of-state of nuclear matter by heavy-ion collisions at intermediate energy in the multi-messenger era
• Determining the density dependence of the nuclear symmetry energy using heavy-ion reactions
• A new probe to study symmetry energy at low density by deuteron breakup reaction
• Isospin blocking and its effects in heavy-ion collisions