Evidence for deconfinement of quarks and gluons from the J/ψ suppression pattern measured in Pb-Pb collisions at the CERN-SPS
Articolo
Data di Pubblicazione:
2000
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//ψ anomalous suppression. This new measurement, besides providing a deeper understanding of the previous observations, reveals a steady significative decrease in the J//ψ production rate up to the most central Pb-Pb collisions. It clearly rules out the presently available conventional (hadronic) models of J//ψ suppression, which unanimously predict a saturation of the J//ψ 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.
Tipologia CRIS:
03A-Articolo su Rivista
Elenco autori:
M.C. Abreu;B. Alessandro;C. Alexa;R. Arnaldi;M. Atayan;C. Baglin;A. Baldit;M. Bedjidian;S. Beolè;V. Boldea;P. Bordalo;A. Bussière;L. Capelli;L. Casagrande;J. Castor;T. Chambon;B. Chaurand;I. Chevrot;B. Cheynis;E. Chiavassa;C. Cicalò;M.P. Comets;N. Constans;S. Constantinescu;J. Cruz;A. De Falco;G. Dellacasa;N. De Marco;A. Devaux;S. Dita;O. Drapier;L. Ducroux;B. Espagnon;J. Fargeix;P. Force;M. Gallio;Y.K. Gavrilov;C. Gerschel;P. Giubellino;M.B. Golubeva;M. Gonin;A.A. Grigorian;J.Y. Grossiord;F.F. Guber;A. Guichard;H. Gulkanyan;R. Hakobyan;R. Haroutunian;M. Idzik;D. Jouan;T.L. Karavitcheva;L. Kluberg;A.B. Kurepin;Y. Le Bornec;C. Lourenço;M. Mac Cormick;P. Macciotta;A. Marzari-Chiesa;M. Masera;A. Masoni;S. Mehrabyan;M. Monteno;S. Mourgues;A. Musso;P. Petiau;A. Piccotti;J.R. Pizzi;F. Prino;G. Puddu;C. Quintans;L. Ramello;S. Ramos;P. Rato-Mendes;L. Riccati;A. Romana;I. Ropotar;P. Saturnini;E. Scomparin;S. Serci;R. Shahoyan;S. Silva;M. Sitta;C. Soave;P. Sonderegger;X. Tarrago;N.S. Topilskaya;G.L. Usai;E. Vercellin;L. Villatte;N. Willis
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