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Titolo:
Evidence for deconfinement of quarks and gluons from the J/psi suppressionpattern measured in Pb-Pb collisions at the CERN-SPS
Autore:
Abreu, MC; Alessandro, B; Alexa, C; Arnaldi, R; Atayan, M; Baglin, C; Baldit, A; Bedjidian, M; Beole, S; Boldea, V; Bordalo, P; Bussiere, A; Capelli, L; Casagrande, L; Castor, J; Chambon, T; Chaurand, B; Chevrot, I; Cheynis, B; Chiavassa, EK; Cicalo, C; Comets, MP; Constans, N; Constantinescu, S; Cruz, J; De Falco, A; Dellacasa, G; De Marco, N; Devaux, A; Dita, S; Drapier, O; Ducroux, L; Espagnon, B; Fargeix, J; Force, P; Gallio, M; Gavrilov, YK; Gerschel, C; Giubellino, P; Golubeva, MB; Gonin, M; Grigorian, AA; Grossiord, JY; Guber, FF; Guichard, A; Gulkanyan, H; Hakobyan, R; Haroutunian, R; Idzik, M; Jouan, D; Karavitcheva, TL; Kluberg, L; Kurepin, AB; Le Bornec, Y; Lourenco, C; Mac Cormick, M; Macciotta, P; Marzari-Chiesa, A; Masera, M; Masoni, A; Mehrabyan, S; Monteno, M; Mourgues, S; Musso, A; Petiau, P; Piccotti, A; Pizzi, JR; Prino, F; Puddu, G; Quintans, C; Ramello, L; Ramos, S; Rato-Mendes, P; Riccati, L; Romana, A; Ropotar, I; Saturnini, P; Scomparin, E; Serci, S; Shahoyan, R; Silva, S; Sitta, H; Soave, C; Sonderegger, P; Tarrago, X; Topilskaya, NS; Usai, GL; Vercellin, E; Villatte, L; Willis, N;
Indirizzi:
Univ Piemonte Orientale, Alessandria, Italy Univ Piemonte Orientale Alessandria Italy Orientale, Alessandria, Italy Ist Nazl Fis Nucl, I-10125 Turin, Italy Ist Nazl Fis Nucl Turin Italy I-10125 azl Fis Nucl, I-10125 Turin, Italy CNRS, IN2P3, Phys Particules Lab, LAPP, Annecy Le Vieux, France CNRS Annecy Le Vieux France rticules Lab, LAPP, Annecy Le Vieux, France Univ Blaise Pascal, CNRS, IN2P3, Phys Corpusculaire Lab, Aubiere, France Univ Blaise Pascal Aubiere France ys Corpusculaire Lab, Aubiere, France Inst Atom Phys, IFA, R-76900 Bucharest, Romania Inst Atom Phys BucharestRomania R-76900 IFA, R-76900 Bucharest, Romania Univ Cagliari, Ist Nazl Fis Nucl, Cagliari, Italy Univ Cagliari CagliariItaly gliari, Ist Nazl Fis Nucl, Cagliari, Italy CERN, Geneva, Switzerland CERN Geneva SwitzerlandCERN, Geneva, Switzerland LIP, Lab Instrumentacao & Fis Particulas, Lisbon, Portugal LIP Lisbon Portugal b Instrumentacao & Fis Particulas, Lisbon, Portugal Russian Acad Sci, Inst Nucl Res, Moscow, Russia Russian Acad Sci Moscow Russia Acad Sci, Inst Nucl Res, Moscow, Russia Univ Paris Sud, CNRS, IN2P3, IPNO, Orsay, France Univ Paris Sud Orsay France Paris Sud, CNRS, IN2P3, IPNO, Orsay, France Ecole Polytech, CNRS, IN2P3, LPNHE, F-91128 Palaiseau, France Ecole Polytech Palaiseau France F-91128 LPNHE, F-91128 Palaiseau, France Univ Turin, Ist Nazl Fis Nucl, Turin, Italy Univ Turin Turin ItalyUniv Turin, Ist Nazl Fis Nucl, Turin, Italy Univ Lyon 1, CNRS, IN2P3, IPNL, F-69622 Villeurbanne, France Univ Lyon 1 Villeurbanne France F-69622 NL, F-69622 Villeurbanne, France Yerevan Phys Inst, Yerevan 375036, Armenia Yerevan Phys Inst Yerevan Armenia 375036 s Inst, Yerevan 375036, Armenia
Titolo Testata:
PHYSICS LETTERS B
fascicolo: 1-3, volume: 477, anno: 2000,
pagine: 28 - 36
SICI:
0370-2693(20000323)477:1-3<28:EFDOQA>2.0.ZU;2-C
Fonte:
ISI
Lingua:
ENG
Soggetto:
158 GEV/C; NUCLEON;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
24
Recensione:
Indirizzi per estratti:
Indirizzo: Abreu, MC Univ Piemonte Orientale, Alessandria, Italy Univ Piemonte Orientale Alessandria Italy Alessandria, Italy
Citazione:
M.C. Abreu et al., "Evidence for deconfinement of quarks and gluons from the J/psi suppressionpattern measured in Pb-Pb collisions at the CERN-SPS", PHYS LETT B, 477(1-3), 2000, pp. 28-36

Abstract

The analysis of the data collected by the NA50 experiment in 1998, reported in this paper, extends and clarifies the pattern of the previously observed J/psi, anomalous suppression. This new measurement, besides providing a deeper understanding of the previous observations, reveals a steady significative decrease in the J/psi production rate up to the most central Pb-Pb collisions. It clearly rules out the presently available conventional (hadronic) models of J/psi suppression, which unanimously predict a saturation ofthe J/psi rate for central Pb-Pb collisions. On the contrary and together with the sharp onset of the anomalous suppression previously reported, the new observation leads to a global production rate pattern which finds its natural explanation in the framework of the formation of a deconfined state of quarks and gluons. (C) 2000 Elsevier Science B.V. All rights reserved.

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Documento generato il 05/12/20 alle ore 23:03:07