ホーム > Event-by-Event Fluctuations of Particle Ratios in Central Pb+Pb Collisions at 20 to 158 AGeV |
Article | |
Report number | nucl-ex/0403035 |
Title | Event-by-Event Fluctuations of Particle Ratios in Central Pb+Pb Collisions at 20 to 158 AGeV |
Related title | EVENT-BY-EVENT PB + PB |
Author(s) |
Roland, C. (MIT, LNS) ; Alt, C. ; Anticic, T. ; Baatar, B. ; Barna, D. ; Bartke, J. ; Betev, L. ; Bialkowska, H. ; Billmeier, A. ; Blume, C. ; Boimska, B. ; Botje, M. ; Bracinik, J. ; Bramm, R. ; Brun, R. ; Buncic, P. ; Cerny, V. ; Christakoglou, P. ; Chvala, O. ; Cramer, J.G. ; Csato, P. ; Darmenov, N. ; Dimitrov, A. ; Dinkelaker, P. ; Eckardt, V. ; Farantatos, G. ; Flierl, D. ; Fodor, Z. ; Foka, P. ; Freund, P. ; Friese, V. ; Gal, J. ; Gazdzicki, M. ; Georgopoulos, G. ; Gladysz, E. ; Grebieszkow, K. ; Hegyi, S. ; Hohne, C. ; Kadija, K. ; Karev, A. ; Kliemant, M. ; Kniege, S. ; Kolesnikov, V.I. ; Kollegger, T. ; Kornas, E. ; Korus, R. ; Kowalski, M. ; Kraus, I. ; Kreps, M. ; van Leeuwen, M. ; Levai, P. ; Litov, L. ; Lungwitz, B. ; Makariev, M. ; Malakhov, A.I. ; Markert, C. ; Mateev, M. ; Mayes, B.W. ; Melkumov, G.L. ; Meurer, C. ; Mischke, A. ; Mitrovski, M. ; Molnar, J. ; Mrowczynski, St. ; Palla, G. ; Panagiotou, A.D. ; Panayotov, D. ; Petridis, A. ; Pikna, M. ; Pinsky, Lawrence S. ; Puhlhofer, F. ; Reid, J.G. ; Renfordt, R. ; Roland, G. ; Richard, A. ; Rybczynski, M. ; Rybicki, A. ; Sandoval, A. ; Sann, H. ; Schmitz, N. ; Seyboth, P. ; Sikler, F. ; Sitar, B. ; Skrzypczak, E. ; Stefanek, G. ; Stock, R. ; Strobele, H. ; Susa, T. ; Szentpetery, I. ; Sziklai, J. ; Trainor, T.A. ; Varga, D. ; Vassiliou, M. ; Veres, G.I. ; Vesztergombi, G. ; Vranic, D. ; Wetzler, A. ; Wlodarczyk, Z. ; Yoo, I.K. ; Zaranek, J. ; Zimanyi, J. |
Publication | 2004 |
Imprint | 2004-03 |
Number of pages | 4 |
Note | 4 pages, 4 figures, Quark Matter 2004 proceedings |
In: | J. Phys. G 30 (2004) S1381-S1384 |
In: | 17th International Conference on Ultra-Relativistic Nucleus-Nucleus Collisions, Oakland, CA, USA, 11 - 17 Jan 2004, pp.S1381-S1384 |
DOI | 10.1088/0954-3899/30/8/132 |
Subject category | Nuclear Physics |
Accelerator/Facility, Experiment | CERN SPS ; NA49 |
Abstract | In the vicinity of the QCD phase transition, critical fluctuations have been predicted to lead to non-statistical fluctuations of particle ratios, depending on the nature of the phase transition. Recent results of the NA49 energy scan program show a sharp maximum of the ratio of K+ to Pi+ yields in central Pb+Pb collisions at beam energies of 20-30 AGeV. This observation has been interpreted as an indication of a phase transition at low SPS energies. We present first results on event-by-event fluctuations of the kaon to pion and proton to pion ratios at beam energies close to this maximum. |