Abstract
Data on charged and neutral kaon and on φ(1020) production in p+p, p+Pb and Pb+Pb collisions at 158 GeV/c·A beam momentum are presented. Strangeness is found to increase smoothly with centrality and Feynman-x in p+Pb and Pb+Pb collisions as compared to p+p interactions. The 〈 K +〉/〈π +〉 ratio shows no significant change with CM-energy after the steep rise above threshold.
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