J/$\psi$ production in proton-nucleus and nucleus-nucleus interactions at the CERN SPS

The NA38 and NA50 experiments at the CERN SPS have measured charmonium production in different colliding systems with the aim of observing a phase transition from ordinary hadronic matter towards a state in which quarks and gluons are deconfined (quark-gluon plasma, QGP). This experimental research...

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Detalles Bibliográficos
Autores principales: Abreu, M C, Alessandro, B, Alexa, C, Arnaldi, R, Ataian, M R, Baglin, C, Baldit, A, Bedjidian, Marc, Beolè, S, Boldea, V, Bordalo, P, Borges, G, Bussière, A, Capelli, L, Castanier, C, Castor, J I, Chaurand, B, Chevrot, I, Cheynis, B, Chiavassa, E, Cicalò, C, Claudino, T, Comets, M P, Constans, N, Constantinescu, S, Cortese, P, De Falco, A, De Marco, N, Dellacasa, G, Devaux, A, Dita, S, Drapier, O, Ducroux, L, Espagnon, B, Fargeix, J, Force, P, Gallio, M, Gavrilov, Yu K, Gerschel, C, Giubellino, P, Golubeva, M B, Gonin, M, Grigorian, A A, Grossiord, J Y, Guber, F F, Guichard, A, Gulkanian, H R, Hakobyan, R S, Haroutunian, R, Idzik, M, Jouan, D, Karavitcheva, T L, Kluberg, L, Kurepin, A B, Le Bornec, Y, Lourenço, C, Macciotta, P, MacCormick, M, Marzari-Chiesa, A, Masera, M, Masoni, A, Monteno, M, Musso, A, Petiau, P, Piccotti, A, Pizzi, J R, Prado da Silva, W L, Prino, F, Puddu, G, Quintans, C, Ramello, L, Ramos, S, Rato-Mendes, P, Riccati, L, Romana, A, Santos, H, Saturnini, P, Scalas, E, Scomparin, E, Serci, S, Shahoyan, R, Sigaudo, F, Silva, S, Sitta, M, Sonderegger, P, Tarrago, X, Topilskaya, N S, Usai, G L, Vercellin, Ermanno, Villatte, L, Willis, N
Lenguaje:eng
Publicado: 2002
Materias:
Particle Physics
Acceso en línea:http://cds.cern.ch/record/562015
Descripción
Sumario:The NA38 and NA50 experiments at the CERN SPS have measured charmonium production in different colliding systems with the aim of observing a phase transition from ordinary hadronic matter towards a state in which quarks and gluons are deconfined (quark-gluon plasma, QGP). This experimental research is based on the prediction that the J/$\psi$ yield should be suppressed in deconfined matter. The analysis of the data collected by the NA50 experiment with Pb-Pb collisions at 158 GeV/c per nucleon shows that the J/$\psi$ is anomalously suppressed with respect to the pattern observed in proton-nucleus and light ion reactions. (9 refs).

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