Charmonia Production at the CERN/SPS

We present the final results of experiment NA50 on charmonia production in Pb-Pb interactions at 158 A GeV. A strong increasing suppression is observed with increasing centrality, for both the $J\psi$ and $\psi^{prime}$ resonances. We also present new developments regarding the jpsi and psiprime nor...

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Detalles Bibliográficos
Autores principales: Borges, G., Alessandro, B., Alexa, C., Arnaldi, R., Atayan, M., Beole, S., Boldea, V., Bordalo, P., Castanier, C., Castor, J., Chaurand, B., Cheynis, B., Chiavassa, E., Cicalo, C., Comets, M.P., Constantinescu, S., Cortese, P., De Falco, A., De Marco, N., Dellacasa, G., Devaux, A., Dita, S., Fargeix, J., Force, P., Gallio, M., Gerschel, C., Giubellino, P., Golubeva, M.B., Grigoryan, A.A., Grigoryan, S., Guber, F.F., Guichard, A., Gulkanyan, H., Idzik, M., Jouan, D., Karavicheva, T.L., Kluberg, L., Kurepin, A.B., Le Bornec, Y., Lourenco, C., Mac Cormick, M., Marzari-Chiesa, A., Masera, M., Masoni, A., Monteno, M., Musso, A., Petiau, P., Piccotti, A., Pizzi, J.R., Prino, F., Puddu, G., Quintans, C., Ramello, L., Ramos, S., Riccati, L., Santos, H., Saturnini, P., Scomparin, E., Serci, S., Shahoyan, R., Sigaudo, F., Sitta, M., Sonderegger, P., Tarrago, X., Topilskaya, N.S., Usai, G.L., Vercellin, E., Villatte, L., Willis, N., Wu, T.
Lenguaje:eng
Publicado: 2005
Materias:
Particle Physics - Experiment
Acceso en línea:https://dx.doi.org/10.1088/0954-3899/32/12/S47
http://cds.cern.ch/record/837684
Descripción
Sumario:We present the final results of experiment NA50 on charmonia production in Pb-Pb interactions at 158 A GeV. A strong increasing suppression is observed with increasing centrality, for both the $J\psi$ and $\psi^{prime}$ resonances. We also present new developments regarding the jpsi and psiprime normal nuclear absorption determinations deduced from proton-nucleus data only. Their comparison with Pb-Pb results allows us to conclude that the $J\psi$ anomalous suppression sets in at mid-centralities while the S-U results show a reasonable agreement with the p-A behavior. The $\psi^{prime}$ suffers a significantly stronger suppression already in S-U interactions, which continuously increases in the Pb-Pb system, and is completely incompatible with the expected behavior deduced from p-A collisions.

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