Sub-threshold phi-meson yield in central 58Ni+58Ni collisions

A. Mangiarotti, N. Herrmann, P. R. Maurenzig +4

The $\varphi$-meson production cross section is measured for the first time at a sub-threshold energy of 1.93 AGeV in \nuc{58}{Ni}+\nuc{58}{Ni} central collisions. The $\varphi$ data were obta…