Strangeness enhancement in Cu-Cu and Au-Au collisions at √S(NN)=200 GeV

Strangeness enhancement in Cu-Cu and Au-Au collisions at √S(NN)=200 GeV

We report new STAR measurements of midrapidity yields for the Λ, Λ[over ¯], K(S)(0), Ξ(-), Ξ[over ¯](+), Ω(-), Ω[over ¯](+) particles in Cu+Cu collisions at √S(NN)==200  GeV, and midrapidity yields for the Λ, Λ[over ¯], K(S)(0) particles in Au+Au at √S(NN)==200  GeV. We show that, at a given number...

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Veröffentlicht in:Physical review letters 2012-02, Vol.108 (7), p.072301-072301
Hauptverfasser: Agakishiev, G, Aggarwal, M M, Ahammed, Z, Alakhverdyants, A V, Alekseev, I, Alford, J, Anderson, B D, Anson, C D, Arkhipkin, D, Averichev, G S, Balewski, J, Barnby, L S, Beavis, D R, Behera, N K, Bellwied, R, Betancourt, M J, Betts, R R, Bhasin, A, Bhati, A K, Bichsel, H, Bielcik, J, Bielcikova, J, Bland, L C, Bordyuzhin, I G, Borowski, W, Bouchet, J, Braidot, E, Brandin, A V, Bridgeman, A, Brovko, S G, Bruna, E, Bueltmann, S, Bunzarov, I, Burton, T P, Cai, X Z, Caines, H, Sánchez, M Calderón de la Barca, Cebra, D, Cendejas, R, Cervantes, M C, Chaloupka, P, Chattopadhyay, S, Chen, H F, Chen, J H, Chen, J Y, Chen, L, Cheng, J, Cherney, M, Chikanian, A, Choi, K E, Christie, W, Chung, P, Codrington, M J M, Corliss, R, Cramer, J G, Crawford, H J, Cui, X, Leyva, A Davila, De Silva, L C, Debbe, R R, Dedovich, T G, Deng, J, Derevschikov, A A, de Souza, R Derradi, Didenko, L, Djawotho, P, Dogra, S M, Dong, X, Drachenberg, J L, Draper, J E, Du, C M, Dunlop, J C, Efimov, L G, Elnimr, M, Engelage, J, Eppley, G, Estienne, M, Eun, L, Evdokimov, O, Fatemi, R, Fedorisin, J, Fersch, R G, Filip, P, Finch, E, Fine, V, Fisyak, Y, Gagliardi, C A, Gangadharan, D R, Geurts, F, Ghosh, P, Gorbunov, Y N, Gordon, A, Grebenyuk, O G, Grosnick, D, Gupta, A, Gupta, S, Guryn, W, Haag, B, Hajkova, O, Hamed, A
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Sprache:eng
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Zusammenfassung:We report new STAR measurements of midrapidity yields for the Λ, Λ[over ¯], K(S)(0), Ξ(-), Ξ[over ¯](+), Ω(-), Ω[over ¯](+) particles in Cu+Cu collisions at √S(NN)==200  GeV, and midrapidity yields for the Λ, Λ[over ¯], K(S)(0) particles in Au+Au at √S(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.
ISSN:1079-7114