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Nuclear Experiment

arXiv:1512.06988 (nucl-ex)
[Submitted on 22 Dec 2015 (v1), last revised 17 May 2016 (this version, v2)]

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

Authors: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. Dželalija, L. Fabbietti, Z. Fodor, I. Gašparić, Y. Grishkin, O.N. Hartmann, K.D. Hildenbrand, B. 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 $\varphi$(1020) mesons is studied in Al+Al collisions at a beam energy of 1.9A GeV which is close or below the production threshold in NN reactions. Inverse slopes, anisotropy parameters, and total emission yields of K$^{\pm}$ 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 $\phi$ mesons are deduced. The contribution to K$^-$ production from $\phi$ meson decays is found to be [17 $\pm$ 3 (stat) $^{+2}_{-7}$ (syst)] %. The results are in line with previous K$^{\pm}$ and $\phi$ data obtained for different colliding systems at similar incident beam energies.
Comments: 16 pages, 11 figures
Subjects: Nuclear Experiment (nucl-ex)
Cite as: arXiv:1512.06988 [nucl-ex]
  (or arXiv:1512.06988v2 [nucl-ex] for this version)
  https://doi.org/10.48550/arXiv.1512.06988
Journal reference: Eur. Phys. J. A (2016) 52: 177
Related DOI: https://doi.org/10.1140/epja/i2016-16177-y

Submission history

From: Krzysztof Piasecki [view email]
[v1] Tue, 22 Dec 2015 09:19:20 UTC (113 KB)
[v2] Tue, 17 May 2016 13:54:59 UTC (427 KB)
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