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Production de J /ψ dans les collisions de proton, oxygène et soufre sur cibles lourdes, à 200 GeV/N

1989; NRC Research Press; Volume: 67; Issue: 12 Linguagem: Inglês

10.1139/p89-205

1208-6045

C. Baglin, A. Bussière, J.P. Guillaud, F. Staley, H. Ogren, P. Sonderegger, A. Baldit, J. Castor, A. Devaux, J. Fargeix, X. Felgeyrolles, P. Force, L. Fredj, G. Landaud, S. Borenstein, Ph. Busson, C. Charlot, B. Chaurand, L. Kluberg, A. Romana, R. Salmeron, M.C. Abreu, G. Barreira, P. Bordalo, Augusto Casaca, André Ferraz, Rui M. L. Ferreira, J.M. Gago, Patrick de Lima Gomes, C. Lourenço, A. Maio, L. Peralta, M. Pimenta, S. Ramos, J. Varela, M. Alimi, M. Bedjidian, D. Contardo, E. Descroix, O. Drapier, J.Y. Grossiord, A. Guichard, R. Haroutunian, J.R. Pizzi, C. Gerschel, A. Sinquin, J. Britz, P. Gorodetzky, L. Kraus, I. Linck, C. Racca, R. Cases,

Quantum Chromodynamics and Particle Interactions

The production of J/ψ at 200 GeV/N, in proton, oxygen, and sulfur collisions with copper and uranium targets has been studied by the NA38 collaboration. When the energy density reached in the collisions increases a suppression of the muon pairs coming from the J/ψ disintegration, relative to those from the continuum, is observed. This relative suppression is stronger when the J/ψ transverse momentum is smaller.[Journal translation]