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Event-by-event fluctuations of the kaon to pion ratio in central Pb+Pb collisions at 158 GeV per Nucleon

(NA49 Collaboration) Afanasiev, SV; Anticic, T; Bachler, J; Barna, D; Barnby, LS; Bartke, J; Barton, RA; Betev, L; Bialkowska, H; Billmeier, A; Blume, C; Blyth, CO; Boimska, B; Botje, M; Bracinik, J; Brady, FP; Bramm, R; Brun, R; Buncic, P; Carr, L; Cebra, D; Cooper, GE; Cramer, JG; Csato, P; Eckardt, V; Eckhardt, F; Ferenc, D; Filip, P; Fischer, HG; Fodor, Z; Foka, P; Freund, P; Friese, V; Ftacnik, J; Gal, J; Gazdzicki, M; Georgopoulos, G; Gladysz, E; Harris, JW; Hegyi, S; Hlinka, V; Hohne, C; Igo, G; Ivanov, M; Jacobs, P; Janik, R; Jones, PG; Kadija, K; Kolesnikov, VI; Kollegger, T; Kowalski, M; Lasiuk, B; van Leeuwen, M; Levai, P; Malakhov, AI; Margetis, S; Markert, C; Mayes, BW; Melkumov, GL; Mischke, A; Molnar, J; Nelson, JM; Odyniec, G; Palla, G; Panagiotou, AD; Petridis, A; Pikna, M; Pinsky, L; Poskanzer, AM; Prindle, DJ; Puhlhofer, F; Reid, JG; Renfordt, R; Retyk, W; Ritter, HG; Rohrich, D; Roland, C; Roland, G; Rybicki, A; Sammer, T; Sandoval, A; Sann, H; Schafer, E; Schmitz, N; Seyboth, P; Sikler, F; Sitar, B; Skrzypczak, E; Snellings, R; Squier, GTA; Stock, R; Strmen, P; Strobele, H; Susa, T; Szarka, I; Szentpetery, I; Sziklai, J; Toy, M; Trainor, TA; Trentalange, S; Ullrich, T; Varga, D; Vassiliou, M; Veres, GI; Vesztergombi, G; Voloshin, S; Vranic, D; Wang, F; Weerasundara, DD; Wenig, S; Wetzler, A; Whitten, C; Xu, N; Yates, TA; Yoo, IK; Zimanyi, J; (2001) Event-by-event fluctuations of the kaon to pion ratio in central Pb+Pb collisions at 158 GeV per Nucleon. Physical Review Letters, 86 (10). pp. 1965-1969. ISSN 0031-9007

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We present the first measurement of fluctuations from event to event in the production of strange particles in collisions of heavy nuclei. The ratio of charged kaons to charged pions is determined for individual central Pb + Pb collisions. After accounting for the fluctuations due to detector resolution and finite number statistics we derive an upper limit on genuine nonstatistical fluctuations, which could be related to a first- or second-order QCD phase transition. Such fluctuations are shown to be very small.

Item Type: Article
Uncontrolled Keywords: strange particles; heavy nuclei
Subjects: NATURAL SCIENCES > Physics
Divisions: Division of Experimental Physics
Project titleProject leaderProject codeProject type
Eksperimentalna fizika visokih energijaKrešo Kadija00980208UNSPECIFIED
Depositing User: Tome Antičić
Date Deposited: 16 Mar 2016 11:04
DOI: 10.1103/PhysRevLett.86.1965

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