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Titolo:
Event-by-event fluctuations of average transverse momentum in central Pb plus Pb collisions at 158 GeV per nucleon
Autore:
Appelshauser, H; Bachler, J; Bailey, SJ; Barna, D; Barnby, LS; Bartke, J; Barton, RA; Betev, L; Bialkowska, H; Billmeier, A; Blyth, CO; Bock, R; Boimska, B; Bormann, C; Brady, FP; Brockmann, R; Brun, R; Buncic, P; Caines, HL; Carr, LD; Cebra, D; Cooper, GE; Cramer, JG; Cristinziani, M; Csato, P; Dunn, J; Eckardt, V; Eckhardt, F; Ferguson, MI; Fischer, HG; Flierl, D; Fodor, Z; Foka, P; Freund, P; Friese, V; Fuchs, M; Gabler, F; Gal, J; Ganz, R; Gazdzicki, M; Geist, W; Gladysz, E; Grebieszkow, J; Gunther, J; Harris, JW; Hegyi, S; Henkel, T; Hill, LA; Hummler, H; Igo, G; Irmscher, D; Jacobs, P; Jones, PG; Kadija, K; Kolesnikov, VI; Kowalski, M; Lasiuk, B; Levai, P; Malakhov, AI; Margetis, S; Markert, C; Melkumov, GL; Mock, A; Molnar, J; Nelson, JM; Oldenburg, M; Odyniec, G; Palla, G; Panagiotou, AD; Petridis, A; Piper, A; Porter, RJ; Poskanzer, AM; Prindle, DJ; Puhlhofer, F; Reid, JG; Renfordt, R; Retyk, W; Ritter, HG; Rohrich, D; Roland, C; Roland, G; Rudolph, H; Rybicki, A; Sammer, T; Sandoval, A; Sann, H; Semenov, AY; Schafer, E; Schmischke, D; Schmitz, N; Schonfelder, S; Seyboth, P; Seyerlein, J; Sikler, F; Skrzypczak, E; Snellings, R; Squier, GTA; Stock, R; Strobele, H; Struck, C; Susa, T; Szentpetery, I; Sziklai, J; Toy, M; Trainor, TA; Trentalange, S; Ullrich, T; Vassiliou, M; Veres, G; Vesztergombi, G; Voloshin, S; Vranic, D; Wang, F; Weerasundara, DD; Wenig, S; Whitten, C; Wienold, T; Wood, L; Xu, N; Yates, TA; Zimanyi, J; Zhu, XZ; Zybert, R;
Indirizzi:
Univ Athens, Dept Phys, Athens, Greece Univ Athens Athens GreeceUniv Athens, Dept Phys, Athens, Greece Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA USA Univ Calif Berkeley Berkeley CA USA rence Berkeley Lab, Berkeley, CA USA Univ Birmingham, Birmingham, W Midlands, England Univ Birmingham Birmingham W Midlands England ngham, W Midlands, England KFKI, Res Inst Particle & Nucl Phys, Budapest, Hungary KFKI Budapest Hungary Res Inst Particle & Nucl Phys, Budapest, Hungary CERN, Geneva, Switzerland CERN Geneva SwitzerlandCERN, Geneva, Switzerland Inst Nucl Phys, Krakow, Poland Inst Nucl Phys Krakow PolandInst Nucl Phys, Krakow, Poland Gesell Schwerionenforsch GSI, Darmstadt, Germany Gesell Schwerionenforsch GSI Darmstadt Germany GSI, Darmstadt, Germany Univ Calif Davis, Davis, CA 95616 USA Univ Calif Davis Davis CA USA 95616Univ Calif Davis, Davis, CA 95616 USA Joint Inst Nucl Res, Dubna, Russia Joint Inst Nucl Res Dubna RussiaJoint Inst Nucl Res, Dubna, Russia Univ Frankfurt, Fachbereich Phys, D-6000 Frankfurt, Germany Univ Frankfurt Frankfurt Germany D-6000 Phys, D-6000 Frankfurt, Germany Kent State Univ, Kent, OH 44242 USA Kent State Univ Kent OH USA 44242Kent State Univ, Kent, OH 44242 USA Univ Calif Los Angeles, Los Angeles, CA USA Univ Calif Los Angeles Los Angeles CA USA s Angeles, Los Angeles, CA USA Univ Marburg, Fachbereich Phys, D-3550 Marburg, Germany Univ Marburg Marburg Germany D-3550 ereich Phys, D-3550 Marburg, Germany Max Planck Inst Phys, D-80805 Munich, Germany Max Planck Inst Phys Munich Germany D-80805 hys, D-80805 Munich, Germany Inst Nucl Studies, PL-00681 Warsaw, Poland Inst Nucl Studies Warsaw Poland PL-00681 tudies, PL-00681 Warsaw, Poland Univ Warsaw, Inst Expt Phys, Warsaw, Poland Univ Warsaw Warsaw PolandUniv Warsaw, Inst Expt Phys, Warsaw, Poland Univ Washington, Nucl Phys Lab, Seattle, WA 98195 USA Univ Washington Seattle WA USA 98195 Nucl Phys Lab, Seattle, WA 98195 USA Yale Univ, New Haven, CT USA Yale Univ New Haven CT USAYale Univ, New Haven, CT USA Rudjer Boskovic Inst, Zagreb, Croatia Rudjer Boskovic Inst Zagreb Croatia djer Boskovic Inst, Zagreb, Croatia
Titolo Testata:
PHYSICS LETTERS B
fascicolo: 4, volume: 459, anno: 1999,
pagine: 679 - 686
SICI:
0370-2693(19990729)459:4<679:EFOATM>2.0.ZU;2-T
Fonte:
ISI
Lingua:
ENG
Soggetto:
HEAVY-ION COLLISIONS; PB+PB COLLISIONS; EQUILIBRATION; AGEV; QCD;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
30
Recensione:
Indirizzi per estratti:
Indirizzo: Appelshauser, H Univ Heidelberg, Inst Phys, Philosophenweg 12, D-6900 Heidelberg, Germany Univ Heidelberg Philosophenweg 12 Heidelberg Germany D-6900
Citazione:
H. Appelshauser et al., "Event-by-event fluctuations of average transverse momentum in central Pb plus Pb collisions at 158 GeV per nucleon", PHYS LETT B, 459(4), 1999, pp. 679-686

Abstract

We present first data on event-by-event fluctuations in the average transverse momentum of charged particles produced in Pb + Pb collisions at the CERN SPS. This measurement provides previously unavailable information allowing sensitive tests of microscopic and thermodynamic collision models and tosearch for fluctuations expected to occur in the vicinity of the predictedQCD phase transition. We find that the observed variance of the event-by-event average transverse momentum is consistent with independent particle production modified by the known two-particle correlations due to quantum statistics and final state interactions and folded with the resolution of the NA49 apparatus. For two specific models of non-statistical fluctuations in transverse momentum limits are derived in terms of fluctuation amplitude. We show that a significant part of the parameter space for a model of isospin fluctuations predicted as a consequence of chiral symmetry restoration ina non-equilibrium scenario is excluded by our measurement. (C) 1999 Published by Elsevier Science B.V. All rights reserved.

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Documento generato il 23/01/21 alle ore 02:44:09