მთავარი > Lambda production in central Pb+Pb collisions at CERN-SPS energies |
Article | |
Report number | nucl-ex/0201012 |
Title | Lambda production in central Pb+Pb collisions at CERN-SPS energies |
Related title | SUPER PROTON SYNCHROTRON |
Author(s) |
Mischke, A. (Pisa U.) ; Afanasiev, S.V. ; Anticic, T. ; Barna, D. ; Bartke, J. ; Barton, R.A. ; Betev, L. ; Bialkowska, H. ; Billmeier, A. ; Blume, C. ; Blyth, C.O. ; Boimska, B. ; Botje, M. ; Bracinik, J. ; Bramm, R. ; Brun, R. ; Buncic, P. ; Cerny, V. ; Cramer, J.G. ; Csato, P. ; Dinkelaker, P. ; Eckardt, V. ; Filip, P. ; Fischer, H.G. ; Fodor, Z. ; Foka, P. ; Freund, P. ; Friese, V. ; Gal, J. ; Gazdzicki, M. ; Georgopoulos, G. ; Gladysz, E. ; Hegyi, S. ; Hohne, C. ; Igo, G. ; Jones, P.G. ; Kadija, K. ; Karev, A. ; Kolesnikov, V.I. ; Kollegger, T. ; Kowalski, M. ; Kraus, I. ; Kreps, M. ; van Leeuwen, M. ; Levai, P. ; Malakhov, A.I. ; Margetis, S. ; Markert, C. ; Mayes, B.W. ; Melkumov, G.L. ; Molnar, J. ; Nelson, John M. ; Palla, G. ; Panagiotou, A.D. ; Perl, K. ; Petridis, A. ; Pikna, M. ; Pinsky, Lawrence S. ; Puhlhofer, F. ; Reid, J.G. ; Renfordt, R. ; Retyk, W. ; Roland, C. ; Roland, G. ; Rybicki, A. ; Sammer, T. ; Sandoval, A. ; Sann, H. ; Schmitz, N. ; Seyboth, P. ; Sikler, F. ; Sitar, B. ; Skrzypczak, E. ; Squier, G.T.A. ; Stock, R. ; Strobele, H. ; Susa, T. ; Szentpetery, I. ; Sziklai, J. ; Trainor, T.A. ; Varga, D. ; Vassiliou, M. ; Veres, G.I. ; Vesztergombi, G. ; Vranic, D. ; Wenig, S. ; Wetzler, A. ; Whitten, C. ; Yoo, I.K. ; Zaranek, J. ; Zimanyi, J. |
Publication | 2002 |
Imprint | 22 Jan 2002 |
Number of pages | 8 |
Note | SQM proceedings. J. Phys. G: Nucl. Part. Phys.: submitted |
In: | J. Phys. G 28 (2002) 1761-1768 |
In: | 6th International Conference on Strange Quarks in Matter : a Flavourspace Odyssey, Frankfurt am Main, Germany, 25 - 29 Sep 2001, pp.1761-1768 |
DOI | 10.1088/0954-3899/28/7/330 |
Subject category | Nuclear Physics - Experiment |
Accelerator/Facility, Experiment | CERN SPS ; NA49 |
Abstract | In this paper we present recent results from the NA49 experiment for $\Lambda$ and $\bar{\Lambda}$ hyperons produced in central Pb+Pb collisions at 40, 80 and 158 A$\cdot$GeV. Transverse mass spectra and rapidity distributions for $\Lambda$ are shown for all three energies. The shape of the rapidity distribution becomes flatter with increasing beam energy. The multiplicities at mid-rapidity as well as the total yields are studied as a function of collision energy including AGS measurements. The ratio $\Lambda/\pi$ at mid-rapidity and in 4$\pi$ has a maximum around 40 A$\cdot$GeV. In addition, $\bar{\Lambda}$ rapidity distributions have been measured at 40 and 80 A$\cdot$GeV, which allows to study the $\bar{\Lambda}$/$\Lambda$ ratio. |