Strangeness enhancement in Cu-Cu and Au-Au collisions at √s =200GeV

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  • T.P. Burton
  • M.A.C. Lamont
  • A.R. Timmins

Colleges, School and Institutes


We report new STAR measurements of midrapidity yields for the Λ, Λ̄, KS0, Ξ , Ξ , Ω , Ω particles in Cu+Cu collisions at √s =200GeV, and midrapidity yields for the Λ, Λ̄, KS0 particles in Au+Au at √s = 200GeV. 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.

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Copyright 2012 Elsevier B.V., All rights reserved.


Original languageEnglish
Article number072301
Pages (from-to)n/a
JournalPhysical Review Letters
Issue number7
Publication statusPublished - 13 Feb 2012