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

Author(s)
Balewski, Jan T.; Betancourt, Michael Joseph; Corliss, Ross; Hays-Wehle, James Prewitt; Leight, William Axel; Milner, Richard G.; Redwine, Robert P.; Seele, J.; Steadman, Stephen G.; Surrow, Bernd; van Nieuwenhuizen, Gerrit Jan; Walker, M.; ... Show more Show less
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Abstract
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.
Date issued
2012-02
URI
http://hdl.handle.net/1721.1/78680
Department
Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear Science
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Agakishiev, G., M. M. Aggarwal, Z. Ahammed, et al. Strangeness Enhancement in Cu-Cu and Au-Au Collisions at √sNN=200  GeV. Physical Review Letters 108(7), 2012. © 2012 American Physical Society
Version: Final published version
ISSN
0031-9007
1079-7114

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