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System-size dependence of Λ and Ξ production in nucleus-nucleus collisions at 40A and 158A GeV measured at the CERN Super Proton Synchrotron

(NA49 Collaboration) Anticic, T.; Baatar, B.; Barna, D.; Bartke, J.; Beck, H.; Betev, L.; Bialkowska, H.; Blume, C.; Boimska, B.; Book, J.; Botje, M.; Bracinik, J.; Buncic, P.; Cerny, V.; Christakoglou, P.; Chung, P.; Chvala, O.; Cramer, J. G.; Csato, P.; Dinkelaker, P.; Eckardt, V.; Fodor, Z.; Foka, P.; Friese, V.; Gal, J.; Gazdzicki, M.; Genchev, V.; Grebieszkow, K.; Hegyi, S.; Hoehne, C.; Kadija, K.; Karev, A.; Kresan, D.; Kolesnikov, V. I.; Kowalski, M.; Kraus, I.; Kreps, M.; Laszlo, A.; Lacey, R.; van Leeuwen, M.; Levai, P.; Litov, L.; Lungwitz, B.; Makariev, M.; Malakhov, A. I.; Mateev, M.; Melkumov, G. L.; Meurer, C.; Mischke, A.; Mitrovski, M.; Molnar, J.; Mrowczynski, St.; Nicolic, V.; Palla, G.; Panagiotou, A. D.; Panayotov, D.; Petridis, A.; Peryt, W.; Pikna, M.; Pluta, J.; Prindle, D.; Puehlhofer, F.; Renfordt, R.; Roland, C.; Roland, G.; Rybczynski, M.; Rybicki, A.; Sandoval, A.; Schmitz, N.; Schuster, T.; Seyboth, P.; Sikler, F.; Sitar, B.; Skrzypczak, E.; Slodkowski, M.; Stefanek, G.; Stock, R.; Strabel, C.; Stroebele, H.; Susa, T.; Szentpetery, I.; Sziklai, J.; Szuba, M.; Szymanski, P.; Utvic, M.; Varga, D.; Vassiliou, M.; Veres, G. I.; Vesztergombi, G.; Vranic, D.; Wlodarczyk, Z.; Wojtaszek, A.; Yoo, I. K.; 6 ] (2009) System-size dependence of Λ and Ξ production in nucleus-nucleus collisions at 40A and 158A GeV measured at the CERN Super Proton Synchrotron. Physical Review C, 80 (3). pp. 1-13. ISSN 2469-9985

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Results on Λ, Λ¯¯¯, and Ξ− production in centrality selected Pb+Pb reactions at 40A and 158A GeV and in near-central C+C and Si+Si reactions at 158A GeV are presented. Transverse mass spectra, rapidity spectra, and multiplicities in dependence of the system size are discussed. Comparisons to transport models (ultrarelativistic quantum molecular dynamics and hadron string dynamics) and to the core-corona approach are performed. Although Λ and Λ¯¯¯ production can be described by transport models reasonably well, these models do not agree with the Ξ− measurements. However, the core-corona picture fits very well the system-size dependence of Λ and Ξ−, whereas it agrees less well with the Λ¯¯¯ data.

Item Type: Article
Uncontrolled Keywords: Lambda; anti-lambda; Xi-production
Subjects: NATURAL SCIENCES > Physics > Nuclear Physics
Divisions: Division of Experimental Physics
Depositing User: Tome Antičić
Date Deposited: 04 Apr 2016 15:33
DOI: 10.1103/PhysRevC.80.034906

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