CERN Accelerating science

Article
Report number nucl-ex/0305017
Title Strangeness from 20-A-GeV to 158-A-GeV
Related titleStrangeness from 20 AGeV to 158 AGeV
Author(s)

Friese, Volker (Darmstadt, GSI) ; Alt, C. (Frankfurt U.) ; Anticic, T. (Boskovic Inst., Zagreb) ; Baatar, B. (Dubna, JINR) ; Barna, D. (Budapest, RMKI) ; Bartke, J. (Cracow, INP) ; Behler, M. (Philipps U. Marburg) ; Betev, L. (Frankfurt U.) ; Białkowska, H. (Warsaw, Inst. Nucl. Studies) ; Billmeier, A. (Frankfurt U.) ; Blume, C. (Darmstadt, GSI) ; Boimska, B. (Warsaw, Inst. Nucl. Studies) ; Botje, M. (Nikhef, Amsterdam) ; Bracinik, J. (Comenius U.) ; Bramm, R. (Frankfurt U.) ; Brun, R. (CERN) ; Bunčić, P. (Frankfurt U. ; CERN) ; Cerny, V. (Dubna, JINR) ; Christakoglou, P. (Athens U.) ; Chvala, O. (Charles U.) ; Cramer, J.G. (Washington U., Seattle) ; Csató, P. (Budapest, RMKI) ; Dinkelaker, P. (Frankfurt U.) ; Eckardt, V. (Munich, Max Planck Inst.) ; Filip, P. (Munich, Max Planck Inst.) ; Fischer, H.G. (CERN) ; Fodor, Z. (Budapest, RMKI) ; Foka, P. (Darmstadt, GSI) ; Freund, P. (Munich, Max Planck Inst.) ; Friese, V. (Philipps U. Marburg ; Darmstadt, GSI) ; Gál, J. (Budapest, RMKI) ; Gaździcki, M. (Frankfurt U.) ; Georgopoulos, G. (Athens U.) ; Gładysz, E. (Cracow, INP) ; Hegyi, S. (Budapest, RMKI) ; Höhne, C. (Philipps U. Marburg) ; Kadija, K. (Boskovic Inst., Zagreb) ; Karev, A. (Munich, Max Planck Inst.) ; Kniege, S. (Frankfurt U.) ; Kolesnikov, V.I. (Dubna, JINR) ; Kollegger, T. (Frankfurt U.) ; Korus, R. (Jan Kochanowski U.) ; Kowalski, M. (Cracow, INP) ; Kraus, I. (Darmstadt, GSI) ; Kreps, M. (Comenius U.) ; van Leeuwen, M. (Nikhef, Amsterdam) ; Lévai, P. (Budapest, RMKI) ; Malakhov, A.I. (Dubna, JINR) ; Markert, C. (Darmstadt, GSI) ; Mayes, B.W. (Houston U.) ; Melkumov, G.L. (Dubna, JINR) ; Meurer, C. (Frankfurt U.) ; Mischke, A. (Darmstadt, GSI) ; Mitrovski, M. (Frankfurt U.) ; Molnár, J. (Budapest, RMKI) ; Mrówczyński, St (Jan Kochanowski U.) ; Pálla, G. (Budapest, RMKI) ; Panagiotou, A.D. (Athens U.) ; Perl, K. (Warsaw U.) ; Petridis, A. (Athens U.) ; Pikna, M. (Comenius U.) ; Pinsky, L. (Houston U.) ; Pühlhofer, F. (Philipps U. Marburg) ; Reid, J.G. (Washington U., Seattle) ; Renfordt, R. (Frankfurt U.) ; Retyk, W. (Warsaw U.) ; Roland, C. (MIT) ; Roland, G. (MIT) ; Rybczyński, M. (Jan Kochanowski U.) ; Rybicki, A. (Cracow, INP ; CERN) ; Sandoval, A. (Darmstadt, GSI) ; Sann, H. (Darmstadt, GSI) ; Schmitz, N. (Munich, Max Planck Inst.) ; Seyboth, P. (Munich, Max Planck Inst.) ; Siklér, F. (Budapest, RMKI) ; Sitar, B. (Comenius U.) ; Skrzypczak, E. (Warsaw U.) ; Stefanek, G. (Jan Kochanowski U.) ; Stock, R. (Frankfurt U.) ; Ströbele, H. (Frankfurt U.) ; Susa, T. (Boskovic Inst., Zagreb) ; Szentpétery, I. (Budapest, RMKI) ; Sziklai, J. (Budapest, RMKI) ; Trainor, T.A. (Washington U., Seattle) ; Varga, D. (Budapest, RMKI) ; Vassiliou, M. (Athens U.) ; Veres, G.I. (Budapest, RMKI) ; Vesztergombi, G. (Budapest, RMKI) ; Vranić, D. (Darmstadt, GSI) ; Wenig, S. (CERN) ; Wetzler, A. (Frankfurt U.) ; Włodarczyk, Z. (Jan Kochanowski U.) ; Yoo, I.K. (Philipps U. Marburg) ; Zaranek, J. (Frankfurt U.) ; Zimányi, J. (Budapest, RMKI)

Publication 2004
Imprint 20 May 2003
Number of pages 11
Note Contribution to the proceedings of "Strangeness in Quark Matter 2003" (March 2003, Atlantic Beach NC, USA), to be published in Journal of Physics G. 11 pages, 14 figures
In: J. Phys. G 30 (2004) S119-S128
In: 7th International Conference on Strangeness in Quark Matter, Atlantic Beach, NC, USA, 12 - 17 Mar 2003, pp.S119-S128
DOI 10.1088/0954-3899/30/1/011
Subject category Nuclear Physics - Experiment
Accelerator/Facility, Experiment CERN SPS ; NA49
Abstract New results from the energy scan programme of NA49, in particular kaon production at 30 AGeV and phi production at 40 and 80 AGeV are presented. The K+/pi+ ratio shows a pronounced maximum at 30 AGeV; the kaon slope parameters are constant at SPS energies. Both findings support the scenario of a phase transition at about 30 AGeV beam energy. The phi/pi ratio increases smoothly with beam energy, showing an energy dependence similar to K-/pi-. The measured particle yields can be reproduced by a hadron gas model, with chemical freeze-out parameters on a smooth curve in the T-muB plane. The transverse spectra can be understood as resulting from a rapidly expanding, locally equilibrated source. No evidence for an earlier kinetic decoupling of heavy hyperons is found.

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