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The φ-meson production cross section is measured for the first time at a sub-threshold energy of 1.93 AGeV in 58Ni+58Ni central collisions. The φ data were obtained within the acceptance of the CDC/Barrel subsystem of FOPI. For a sample of 4.7×10 6 central events, after background subtraction, 23 candidates were observed. Extensive GEANT simulations of the detector performance are shown in...
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