HAL : in2p3-00666053, version 1

arXiv : 1107.2955

DOI : 10.1103/PhysRevLett.108.072301

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Physical Review Letters 108 (2012) 072301

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

H. Agakishiev, W. Borowski1, M. Estienne1, S. Kabana1

STAR Collaboration(s)

(2012)

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.

1 :	SUBATECH - Laboratoire SUBATECH Nantes

Thème(s)

:

Physique/Physique Nucléaire Expérimentale

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Contributeur : Dominique Girod <>

Soumis le : Vendredi 3 Février 2012, 14:20:47

Dernière modification le : Lundi 19 Mars 2012, 14:02:54