Isospin dependence of relative yields of $K^+$ and $K^0$ mesons at 1.528 A GeV
- Lopez, X.
- J. Kim, Y.
- Herrmann, N.
- Andronic, A.
- Barret, V.
- Basrak, Z.
- Bastid, N.
- L. Benabderrahmane, M.
- Čaplar, R.
- Cordier, E.
- Crochet, P.
- Dupieux, P.
- Dželalija, M.
- Fodor, Z.
- Gašparic, I.
- Grishkin, Y.
- N. Hartmann, O.
- D. Hildenbrand, K.
- Hong, B.
- I. Kang, T.
- Kecskemeti, J.
- Kirejczyk, M.
- Kiš, M.
- Koczon, P.
- Korolija, M.
- Kotte, R.
- Lebedev, A., A.
- Leifels, Y.
- Merschmeyer, M.
- Neubert, W.
- Pelte, D.
- Petrovici, M.
- Rami, F.
- Reisdorf, W.
- S. Ryu, M.
- Schüttauf, A.
- Seres, Z.
- Sikora, B.
- S. Sim, K.
- Simion, V.
- Siwek-Wilczyńska, K.
- Smolyankin, V.
- Stoicea, G.
- Tyminski, Z.
- Wagner, P.
- Wisniewski, K.
- Wohlfarth, D.
- G. Xiao, Z.
- Yushmanov, I.
- Y. Zhang, X.
- Zhilin, A.
- Ferini, G.
- Gaitanos, T.
DOIAbstract
FOPIResults on $K^+$ and $K^0$ meson production in $^{96}_{44}$Ru + $^{96}_{44}$Ru and $^{96}_{40}$Zr + $^{96}_{40}$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 simu...
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