Strangeness Enhancement in Cu-Cu and Au-Au Collisions at √sNN=200 GeV

• Main Authors: Balewski, Jan T. (Contributor), Betancourt, Michael Joseph (Contributor), Corliss, Ross (Contributor), Hays-Wehle, James Prewitt (Contributor), Leight, William Axel (Contributor), Milner, Richard G. (Contributor), Redwine, Robert P. (Contributor), Seele, J. (Contributor), Steadman, Stephen G. (Contributor), Surrow, Bernd (Contributor), van Nieuwenhuizen, Gerrit Jan (Contributor), Walker, M. (Contributor)
• Other Authors: Massachusetts Institute of Technology. Department of Physics (Contributor), Massachusetts Institute of Technology. Laboratory for Nuclear Science (Contributor)
• Format: Article
• Language: English
• Published: American Physical Society, 2013-05-03T16:01:47Z.
• Subjects: Article
• Online Access: Get fulltext

We report new STAR measurements of midrapidity yields for the Λ, Λ̅ , K[subscript S][superscript 0], Ξ[superscript -], Ξ̅ [superscript +], Ω[superscript -], Ω̅ [superscript +] particles in Cu+Cu collisions at √s[subscript NN]=200  GeV, and midrapidity yields for the Λ, Λ̅ , K[subscript S][superscript 0] particles in Au+Au at √s[subscript NN]=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.
United States. Dept. of Energy. Office of Science
National Science Foundation (U.S.)
Alfred P. Sloan Foundation