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Phys Rev Lett. 2004 Jul 09;93(2):022302. doi: 10.1103/PhysRevLett.93.022302. Epub 2004 Jul 09.

Lambda and lambda production in central Pb-Pb collisions at 40, 80, and 158A GeV.

Physical review letters

T Anticic, B Baatar, D Barna, J Bartke, M Behler, L Betev, H Białkowska, A Billmeier, C Blume, B Boimska, M Botje, J Bracinik, R Bramm, R Brun, P Buncić, V Cerny, P Christakoglou, O Chvala, J G Cramer, P Csató, N Darmenov, A Dimitrov, P Dinkelaker, V Eckardt, P Filip, D Flierl, Z Fodor, P Foka, P Freund, V Friese, J Gál, M Gaździcki, G Georgopoulos, E Gładysz, S Hegyi, C Höhne, K Kadija, A Karev, V I Kolesnikov, T Kollegger, E Kornas, R Korus, M Kowalski, I Kraus, M Kreps, M van Leeuwen, P Lévai, L Litov, M Makariev, A I Malakhov, C Markert, M Mateev, B W Mayes, G L Melkumov, C Meurer, A Mischke, M Mitrovski, J Molnár, St Mrówczyński, G Pálla, A D Panagiotou, D Panayotov, K Perl, A Petridis, M Pikna, L Pinsky, F Pühlhofer, J G Reid, R Renfordt, W Retyk, C Roland, G Roland, M Rybczyński, A Rybicki, A Sandoval, H Sann, N Schmitz, P Seyboth, F Siklér, B Sitar, E Skrzypczak, G Stefanek, R Stock, H Ströbele, T Susa, I Szentpétery, J Sziklai, T A Trainor, D Varga, M Vassiliou, G I Veres, G Vesztergombi, D Vranić, A Wetzler, Z Włodarczyk, I K Yoo, J Zaranek, J Zimányi

Affiliations

  1. Rudjer Boskovic Institute, Zagreb, Croatia.

PMID: 15323906 DOI: 10.1103/PhysRevLett.93.022302

Abstract

Production of Lambda and Antilambda hyperons was measured in central Pb-Pb collisions at 40, 80, and 158A GeV beam energy on a fixed target. Transverse mass spectra and rapidity distributions are given for all three energies. The Lambda/pi ratio at midrapidity and in full phase space shows a pronounced maximum between the highest BNL Alternating Gradient Synchrotron and 40A GeV CERN Super Proton Synchrotron energies, whereas the Lambda/pi ratio exhibits a monotonic increase.

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