CERN Accelerating science

Article
Report number hep-ex/0202037
Title $\Xi^{-}$ and $\bar{\Xi}^{+}$ production in central Pb+Pb collisions at 158 GeV/c per nucleon
Author(s)

Afanasiev, S.V (Dubna, JINR) ; Anticic, T (Boskovic Inst., Zagreb) ; Barna, D (Budapest, RMKI) ; Bartke, J (Cracow, INP) ; Barton, R.A (Birmingham U.) ; Betev, L (Frankfurt U.) ; Białkowska, H (Warsaw, Inst. Nucl. Studies) ; Billmeier, A (Frankfurt U.) ; Blume, C (Darmstadt, GSI) ; Blyth, C.O (Birmingham U.) ; 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 (Comenius 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) ; 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) ; Igo, G (UCLA) ; Jones, P.G (Birmingham U.) ; Kadija, K (CERN ; Boskovic Inst., Zagreb) ; Karev, A (Munich, Max Planck Inst.) ; Kolesnikov, V.I (Dubna, JINR) ; Kollegger, T (Frankfurt 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) ; Margetis, S (Kent State U.) ; Markert, C (Darmstadt, GSI) ; Mayes, B.W (Houston U.) ; Melkumov, G.L (Dubna, JINR) ; Mischke, A (Darmstadt, GSI) ; Molnár, J (Budapest, RMKI) ; Nelson, J.M (Birmingham 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) ; Rybicki, A (Cracow, INP) ; Sammer, T (Munich, Max Planck Inst.) ; 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.) ; Squier, G.T.A (Birmingham 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.) ; Whitten, C (UCLA) ; Yoo, I.K (Philipps U. Marburg) ; Zaranek, J (Frankfurt U.) ; Zimányi, J (Budapest, RMKI)

Publication 2002
Imprint 21 Feb 2002
Number of pages 10
Note 10 pages, 9 figures
In: Phys. Lett. B 538 (2002) 275-281
DOI 10.1016/S0370-2693(02)01970-6
Subject category Particle Physics - Experiment
Accelerator/Facility, Experiment CERN SPS ; NA49
Abstract Results of the production of $\Xi^{-}$ and $\bar{\Xi}^{+}$ hyperons in central Pb+Pb interactions at 158 GeV/c per nucleon are presented. This analysis utilises a global reconstruction procedure, which allows a measurement of $4\pi$ integrated yields to be made for the first time. Inverse slope paramters, which are determined from an exponential fit to the transverse mass spectra, are shown. Central rapidity densities are found to be 1.49 +- 0.08 and 0.33 +- 0.04 per event per unit of rapidity for $\Xi^{-}$ and $\bar{\Xi}^{+}$ respectively. Yields integrated to full phase space are 4.12 +- 0.02 and 0.77 +- 0.04 for $\Xi^{-}$ and $\bar{\Xi}^{+}$. The ratio of $\bar{\Xi}^{+}$/$\Xi^{-}$ at mid-rapidity is 0.22 +- 0.03.
Copyright/License Elsevier Science B.V.

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