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Titolo:
Results from the NA50 experiment on J/Psi suppression in Pb-Pb collisions at the CERN SPS
Autore:
Monteno, M; 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, E; Cicalo, C; Claudino, T; Comets, MP; Constans, N; Constantinescu, S; De Marco, N; Dellacasa, G; Devaux, A; Dita, S; Drapier, O; Espagnon, B; Fargeix, J; Force, P; Gallio, M; Gavrilov, YK; Gerschel, C; Giubellino, P; Golubeva, MB; Gonin, M; Grigorian, AA; Grossiord, JY; Guichard, A; Gulkanyan, H; Hakobyan, R; Haroutunian, R; Idzik, M; Jouan, D; Karavitcheva, TL; Kluberg, L; Kurepin, AB; Le Bornec, Y; Macciotta, P; Mac Cormick, M; Marzari-Chiesa, A; Masera, M; Masoni, A; Mehrabyan, S; Monteno, M; Musso, A; Petiau, P; Piccotti, A; Pizzi, JR; Prino, F; Puddu, G; Quintans, C; Ramos, S; Ramello, L; Mendes, PR; Riccati, L; Romana, A; Ropotar, I; Saturnini, P; Scomparin, E; Serci, S; Shahoyan, R; Silva, S; Sitta, M; Soave, C; Sonderegger, P; Tarrago, X; Topilskaya, NS; Usai, GL; Vercellin, E; Villatte, L; Willis, N;
Indirizzi:
LIP, P-1000 Lisbon, Portugal LIP Lisbon Portugal P-1000LIP, P-1000 Lisbon, Portugal CNRS, IN2P3, LAPP, Annecy Le Vieux, France CNRS Annecy Le Vieux FranceCNRS, IN2P3, LAPP, Annecy Le Vieux, France Univ Blaise Pascal, LPC, Aubiere, France Univ Blaise Pascal Aubiere France v Blaise Pascal, LPC, Aubiere, France CNRS, IN2P3, Aubiere, France CNRS Aubiere FranceCNRS, IN2P3, Aubiere, France IFA, Bucharest, Romania IFA Bucharest RomaniaIFA, Bucharest, Romania Univ Cagliari, Ist Nazl Fis Nucl, Cagliari, Italy Univ Cagliari CagliariItaly gliari, Ist Nazl Fis Nucl, Cagliari, Italy CERN, CH-1211 Geneva 23, Switzerland CERN Geneva Switzerland 23CERN, CH-1211 Geneva 23, Switzerland INR, Moscow, Russia INR Moscow RussiaINR, Moscow, Russia Univ Paris 11, IPN, Orsay, France Univ Paris 11 Orsay FranceUniv Paris 11, IPN, Orsay, France CNRS, IN2P3, Orsay, France CNRS Orsay FranceCNRS, IN2P3, Orsay, France Ecole Polytech, LPNHE, Palaiseau, France Ecole Polytech Palaiseau France cole Polytech, LPNHE, Palaiseau, France CNRS, IN2P3, Palaiseau, France CNRS Palaiseau FranceCNRS, IN2P3, Palaiseau, France Univ Turin, Ist Nazl Fis Nucl, Turin, Italy Univ Turin Turin ItalyUniv Turin, Ist Nazl Fis Nucl, Turin, Italy Univ Lyon 1, IPN, F-69622 Villeurbanne, France Univ Lyon 1 Villeurbanne France F-69622 PN, F-69622 Villeurbanne, France CNRS, IN2P3, Villeurbanne, France CNRS Villeurbanne FranceCNRS, IN2P3, Villeurbanne, France YerPhI, Yerevan, Armenia YerPhI Yerevan ArmeniaYerPhI, Yerevan, Armenia Univ Algarve, Unidad Ciencias Exactas & Humanas, P-8000 Faro, Portugal Univ Algarve Faro Portugal P-8000 actas & Humanas, P-8000 Faro, Portugal Univ Tecn Lisbon, Inst Super Tecn, P-1096 Lisbon, Portugal Univ Tecn Lisbon Lisbon Portugal P-1096 er Tecn, P-1096 Lisbon, Portugal
Titolo Testata:
NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS
, volume: 92, anno: 2001,
pagine: 43 - 54
SICI:
0920-5632(200102)92:<43:RFTNEO>2.0.ZU;2-O
Fonte:
ISI
Lingua:
ENG
Soggetto:
QUARK-GLUON PLASMA; DRELL-YAN PRODUCTION; CHARMONIUM SUPPRESSION; 158 GEV/C; NUCLEAR COLLISIONS; PB+PB COLLISIONS; 450 GEV/C; PSI'; DECONFINEMENT;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
28
Recensione:
Indirizzi per estratti:
Indirizzo: Monteno, M LIP, P-1000 Lisbon, Portugal LIP Lisbon Portugal P-1000LIP, P-1000 Lisbon, Portugal
Citazione:
M. Monteno et al., "Results from the NA50 experiment on J/Psi suppression in Pb-Pb collisions at the CERN SPS", NUCL PH B-P, 92, 2001, pp. 43-54

Abstract

The NA50 experiment has measured, at the CERN SPS: the dimuon production in Pb-Pb collisions at 158 GeV/c per nucleon, following the program of the previous NA38 and NA51 experiments, performed with proton and light ion beams. The J/psi production has been studied by NA50 as a function of the centrality of the collisions. The results of the analyses performed on three data samples, collected from 1995 to 1998 show that for peripheral collisions the J/Psi cross section can be understood in terms of ordinary nuclear absorption: consistently with the extrapolation of previous measurements extending from p-p to S-U. On the contrary, the central events show an anomalous J/Psi suppression, and the pattern of J/Psi yield versus centrality features two discontinuities that cannot be described by conventional models basedon hadronic scenarios. These results can be considered as a strong indication of the creation of a new state of matter in central Pb-Pb collisions atthe SPS.

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Documento generato il 05/12/20 alle ore 23:33:05