209 articles – 1940 Notices  [english version]
 HAL : in2p3-00666053, version 1
 arXiv : 1107.2955
 Physical Review Letters 108 (2012) 072301
 Strangeness Enhancement in Cu+Cu and Au+Au Collisions at \sqrt{s_{NN}} = 200 GeV
 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.
 Thème(s) : Physique/Physique Nucléaire Expérimentale
 Lien vers le texte intégral : http://fr.arXiv.org/abs/1107.2955
 in2p3-00666053, version 1 http://hal.in2p3.fr/in2p3-00666053 oai:hal.in2p3.fr:in2p3-00666053 Contributeur : Dominique Girod <> Soumis le : Vendredi 3 Février 2012, 14:20:47 Dernière modification le : Lundi 19 Mars 2012, 14:02:54