J/PSI SUPPRESSION AS EVIDENCE FOR HIGH-DENSITIES IN NUCLEAR COLLISIONS

GAVIN S, Satz H, THEWS RL, VOGT R. J/PSI SUPPRESSION AS EVIDENCE FOR HIGH-DENSITIES IN NUCLEAR COLLISIONS. ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS. 1994;61(2):351-355.We determine the hadron density necessary to account for J/psi suppression in nuclear collisions by absorption, including the effects of nuclear stopping and J/psi formation time. The suppression measured in central 200 GeV/A O-U and S-U collisions cannot be obtained from interactions of the J/psi with the primary nucleons alone. Absorption on primary and secondary hadrons can describe these data, however, provided the density of the secondaries is at least 0.8 fm-3 i.e., five times standard nuclear density