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Strangeness Enhancement in Cu+Cu and Au+Au Collisions at \sqrt{s_{NN}} = 200 GeV

Abstract : We report new STAR measurements of mid-rapidity yields for the $\Lambda$, $\bar{\Lambda}$, $K^{0}_{S}$, $\Xi^{-}$, $\bar{\Xi}^{+}$, $\Omega^{-}$, $\bar{\Omega}^{+}$ particles in Cu+Cu collisions at \sNN{200}, and mid-rapidity yields for the $\Lambda$, $\bar{\Lambda}$, $K^{0}_{S}$ particles in Au+Au at \sNN{200}. 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 parameterization based on the fraction of participants that undergo multiple collisions.
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http://hal.in2p3.fr/in2p3-00666053
Contributor : Dominique Girod <>
Submitted on : Friday, February 3, 2012 - 2:20:47 PM
Last modification on : Monday, June 15, 2020 - 3:00:02 PM

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H. Agakishiev, W. Borowski, Magali Estienne, S. Kabana. Strangeness Enhancement in Cu+Cu and Au+Au Collisions at \sqrt{s_{NN}} = 200 GeV. Physical Review Letters, American Physical Society, 2012, 108, pp.072301. ⟨10.1103/PhysRevLett.108.072301⟩. ⟨in2p3-00666053⟩

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