Azimuthal emission patterns of K+ and of K-mesons in Ni+Ni collisions near the strangeness production threshold

V. Zinyuk, T. I. Kang, Y. Leifels, N. Herrmann, B. Hong, R. Averbeck, A. Andronic, V. Barret, Z. Basrak, N. Bastid, M. L. Benabderrahmane, M. Berger, P. Buehler, M. Cargnelli, R. Čaplar, I. Carevic, P. Crochet, I. Deppner, P. Dupieux, M. DŽelalijaL. Fabbietti, Z. Fodor, P. Gasik, I. Gašparić, Y. Grishkin, O. N. Hartmann, K. D. Hildenbrand, J. Kecskemeti, Y. J. Kim, M. Kirejczyk, M. Kiš, P. Koczon, R. Kotte, A. Lebedev, A. Le Fèvre, J. L. Liu, X. Lopez, V. Manko, J. Marton, T. Matulewicz, R. Münzer, M. Petrovici, K. Piasecki, F. Rami, A. Reischl, W. Reisdorf, M. S. Ryu, P. Schmidt, A. Schüttauf, Z. Seres, B. Sikora, K. S. Sim, V. Simion, K. Siwek-Wilczyńska, V. Smolyankin, K. Suzuki, Z. Tyminski, P. Wagner, E. Widmann, K. Wiśniewski, Z. G. Xiao, I. Yushmanov, Y. Zhang, A. Zhilin, J. Zmeskal, E. Bratkovskaya, C. Hartnack

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Abstract

Azimuthal emission patterns of K± mesons have been measured in Ni + Ni collisions with the FOPI spectrometer at a beam kinetic energy of 1.91 A GeV. The transverse momentum pT integrated directed and elliptic flow of K+ and K- mesons as well as the centrality dependence of pT - differential directed flow of K+ mesons are compared to the predictions of hadron string dynamics and isospin quantum molecular dynamics transport models. The data exhibits different propagation patterns of K+ and K- mesons in the compressed and heated nuclear medium and favor the existence of a kaon-nucleon in-medium potential, repulsive for K+ mesons and attractive for K- mesons.

Original languageEnglish (US)
Article number025210
JournalPhysical Review C - Nuclear Physics
Volume90
Issue number2
DOIs
StatePublished - Aug 25 2014

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ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Zinyuk, V., Kang, T. I., Leifels, Y., Herrmann, N., Hong, B., Averbeck, R., Andronic, A., Barret, V., Basrak, Z., Bastid, N., Benabderrahmane, M. L., Berger, M., Buehler, P., Cargnelli, M., Čaplar, R., Carevic, I., Crochet, P., Deppner, I., Dupieux, P., ... Hartnack, C. (2014). Azimuthal emission patterns of K+ and of K-mesons in Ni+Ni collisions near the strangeness production threshold. Physical Review C - Nuclear Physics, 90(2), [025210]. https://doi.org/10.1103/PhysRevC.90.025210