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

G. Agakishiev et al. (STAR Collaboration)
Phys. Rev. Lett. 108, 072301 – Published 13 February 2012

Abstract

We report new STAR measurements of midrapidity yields for the Λ, Λ¯, KS0, Ξ, Ξ¯+, Ω, Ω¯+ particles in Cu+Cu collisions at sNN=200GeV, and midrapidity yields for the Λ, Λ¯, KS0 particles in Au+Au at sNN=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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  • Received 15 July 2011

DOI:https://doi.org/10.1103/PhysRevLett.108.072301

© 2012 American Physical Society

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Vol. 108, Iss. 7 — 17 February 2012

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