K0 and Λ production in Ni+Ni collisions near threshold

M. Merschmeyer, X. Lopez, N. Bastid, P. Crochet, N. Herrmann, A. Andronic, V. Barret, Z. Basrak, M. L. Benabderrahmane, R. Čaplar, E. Cordier, P. Dupieux, M. Dželalija, Z. Fodor, I. Gašparić, Y. Grishkin, O. N. Hartmann, K. D. Hildenbrand, B. Hong, T. I. KangJ. Kecskemeti, Y. J. Kim, M. Kirejczyk, M. Kiš, T. Matulewicz, P. Koczon, M. Korolija, R. Kotte, A. Lebedev, Y. Leifels, A. Mangiarotti, D. Pelte, M. Petrovici, F. Rami, W. Reisdorf, M. S. Ryu, A. Schüttauf, Z. Seres, B. Sikora, K. S. Sim, V. Simion, K. Siwek-Wilczyńska, V. Smolyankin, G. Stoicea, Z. Tyminski, K. Wiśniewski, Z. G. Xiao, H. S. Xu, I. Yushmanov, X. Y. Zhang, A. Zhilin

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Abstract

New results concerning the production of neutral strange particles, K0 and Λ in Ni+Ni collisions at 1.93A 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 K0 data agree with previously reported K+ measurements, the Λ 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 GSI Schwerionen Synchrotron (SIS) energies.

Original languageEnglish
Article number024906
JournalPhysical Review C - Nuclear Physics
Volume76
Issue number2
DOIs
Publication statusPublished - Aug 16 2007

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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    Merschmeyer, M., Lopez, X., Bastid, N., Crochet, P., Herrmann, N., Andronic, A., Barret, V., Basrak, Z., Benabderrahmane, M. L., Čaplar, R., Cordier, E., Dupieux, P., Dželalija, M., Fodor, Z., Gašparić, I., Grishkin, Y., Hartmann, O. N., Hildenbrand, K. D., Hong, B., ... Zhilin, A. (2007). K0 and Λ production in Ni+Ni collisions near threshold. Physical Review C - Nuclear Physics, 76(2), [024906]. https://doi.org/10.1103/PhysRevC.76.024906