$\psi'$ production in nucleus–nucleus collisions at CERN SPS
- Santos, H.
- Alessandro, B.
- Alexa, C.
- Arnaldi, R.
- Atayan, M.
- Beole, S.
- Boldea, V.
- Bordalo, P.
- Borges, C.
- 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.
- Grigorian, A.A.
- Grigoryan, S.
- Guber, F.F.
- Guichard, A.
- Gulkanyan, H.
- Idzik, M.
- Jouan, D.
- Karavitcheva, T.L.
- Kluberg, L.
- Kurepin, A.B.
- Le Bornec, Y.
- Lourenço, C.
- Mac Cormick, M.
- Marzari-Chiesa, A.
- Masera, M.
- Masoni, A.
- Monteno, M.
- Musso, A.
- Petiau, P.
- Picotti, A.
- Pizzi, J.-R.
- Prino, F.
- Puddu, G.
- Quintans, C.
- Ramello, L.
- Ramos, S.
- Riccati, L.
- Saturnini, P.
- Scomparin, P.
- 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.
DOIAbstract
NA50 EIWe report results on $\psi'$ production in Pb–Pb interactions at 158 GeV/c per nucleon incident momentum, from data collected by the NA50 experiment at CERN SPS. A comparison of proton- and sulfur-induced collisions shows a similar $\psi'$ production rate per nucleon–nucleon collision for S–U and Pb–Pb reactions, decreasing with increasing centrality and significantly lower than the rate measured from proton-induced reactions. This feature contrasts with J/$\psi$ production which exhibits a similar behaviour for reactions induced by protons and by sulfur nuclei and a significantly suppressed rate for Pb–Pb interactions
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