Abstract
The NA61/SHINE experiment at the CERN Super Proton Synchrotron (SPS) studies the onset of deconfinement in hadron matter by a scan of particle production in collisions of nuclei with various sizes at a set of energies covering the SPS energy range. This paper presents results on inclusive double-differential spectra, transverse momentum and rapidity distributions and mean multiplicities of pi ^pm , K^pm , p and bar{p} produced in the 20% most central^7Be+^9Be collisions at beam momenta of 19A, 30A, 40A, 75A and 150A {mathrm{Ge} mathrm{V}}!/!c. The energy dependence of the K^pm /pi ^pm ratios as well as of inverse slope parameters of the K^pm transverse mass distributions are close to those found in inelastic p+p reactions. The new results are compared to the world data on p+p and Pb+Pb collisions as well as to predictions of the Epos, Urqmd, Ampt, Phsd and Smash models.
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