%0 Journal Article %T Strange meson production in Al+Al collisions at 1.9A GeV %A P. Gasik %A K. Piasecki %A N. Herrmann %A Y. Leifels %A T. Matulewicz %A A. Andronic %A R. Averbeck %A V. Barret %A Z. Basrak %A N. Bastid %A M. L. Benabderrahmane %A M. Berger %A P. Buehler %A M. Cargnelli %A R. £¿aplar %A P. Crochet %A O. Czerwiakowa %A I. Deppner %A P. Dupieux %A M. D£¿elalija %A L. Fabbietti %A Z. Fodor %A I. Ga£¿pari£¿ %A Y. Grishkin %A O. N. Hartmann %A K. D. Hildenbrand %A B. Hong %A T. I. Kang %A J. Kecskemeti %A Y. J. Kim %A M. Kirejczyk %A M. Ki£¿ %A P. Koczon %A R. Kotte %A A. Lebedev %A A. Le F¨¨vre %A J. L. Liu %A X. Lopez %A V. Manko %A J. Marton %A R. M¨¹nzer %A M. Petrovici %A F. Rami %A A. Reischl %A W. Reisdorf %A M. S. Ryu %A P. Schmidt %A A. Sch¨¹ttauf %A Z. Seres %A B. Sikora %A K. S. Sim %A V. Simion %A K. Siwek-Wilczy¨½ska %A V. Smolyankin %A K. Suzuki %A Z. Tymi¨½ski %A P. Wagner %A I. Weber %A E. Widmann %A K. Wi£¿niewski %A Z. G. Xiao %A I. Yushmanov %A Y. Zhang %A A. Zhilin %A V. Zinyuk %A J. Zmeskal %J Statistics %D 2015 %I arXiv %X The production of K$^+$, K$^-$ and $\varphi$(1020) mesons is studied in Al+Al collisions at 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 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. %U http://arxiv.org/abs/1512.06988v1