We report new STAR measurements of midrapidity yields for the Λ , Λ ¯ , K S 0 , Ξ - , Ξ ¯ + , Ω - , Ω ¯ + particles in Cu + Cu collisions at s N N = 200 GeV , and midrapidity yields for the Λ , Λ ¯ , K S 0 particles in Au + Au at s N N = 200 GeV . We show that, at a given number of participating nucleons, the production of strange hadrons is higher in Cu + Cu collisions than in Au + Au collisions at the same center-of-mass energy. We find that aspects of the enhancement factors for all particles can be described by a parametrization based on the fraction of participants that undergo multiple collisions.
/lp/american-physical-society-aps/strangeness-enhancement-in-cu-cu-and-au-au-collisions-at-s-n-n-200-gev-vN0IDibbrJ