Strange meson production in Al+Al collisions at 1.9 A GeV

P. Gasik, K. Piasecki, N. Herrmann, Y. Leifels, T. Matulewicz, A. Andronic, R. Averbeck, V. Barret, Z. Basrak, N. Bastid, M. L. Benabderrahmane, M. Berger, P. Buehler, M. Cargnelli, R. Čaplar, P. Crochet, O. Czerwiakowa, I. Deppner, P. Dupieux, M. DželalijaL. Fabbietti, Z. Fodor, I. Gašparić, Y. Grishkin, O. N. Hartmann, K. D. Hildenbrand, Byungsik Hong, T. I. Kang, 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, R. Münzer, M. Petrovici, 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. Tymiński, P. Wagner, I. Weber, E. Widmann, K. Wiśniewski, Z. G. Xiao, I. Yushmanov, Y. Zhang, A. Zhilin, V. Zinyuk, J. Zmeskal

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Abstract

The production of K+, K- and ɸ (1020) mesons is studied in Al+Al collisions at a beam energy of 1.9A GeV which is close to or below the production threshold in NN reactions. Inverse slopes, anisotropy parameters, and total emission yields of K± mesons are obtained. A comparison of the ratio of kinetic energy distributions of K- and K+ mesons to the HSD transport model calculations suggests that the inclusion of the in-medium modifications of kaon properties is necessary to reproduce the ratio. The inverse slope and total yield of ɸ mesons are deduced. The contribution to K- production from ɸ meson decays is found to be [17 ± 3(stat)+2 -7(syst)]%. The results are in line with the previous K± and ɸ data obtained for different colliding systems at similar incident beam energies.

Original languageEnglish
Article number177
JournalEuropean Physical Journal A
Volume52
Issue number6
DOIs
Publication statusPublished - 2016 Jun 1

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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    Gasik, P., Piasecki, K., Herrmann, N., Leifels, Y., Matulewicz, T., Andronic, A., Averbeck, R., Barret, V., Basrak, Z., Bastid, N., Benabderrahmane, M. L., Berger, M., Buehler, P., Cargnelli, M., Čaplar, R., Crochet, P., Czerwiakowa, O., Deppner, I., Dupieux, P., ... Zmeskal, J. (2016). Strange meson production in Al+Al collisions at 1.9 A GeV. European Physical Journal A, 52(6), [177]. https://doi.org/10.1140/epja/i2016-16177-y