Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1997-12-10
Physics
High Energy Physics
High Energy Physics - Phenomenology
Invited talk presented at the 7th Asia-Pacific Physics Conference, August 19-23, 1997, Beijing, China, to be published in the
Scientific paper
We review the search for the quark-gluon plasma using the signal of the suppression of J/psi production in high-energy heavy-ion collisions. Recent observations of anomalous J/psi suppression in high-energy Pb-Pb collisions observed by the NA50 Collaboration are examined and compared with earlier results from pA and nucleus-nucleus collisions with heavy ions of smaller mass numbers. The anomalous suppression of J/psi production in Pb-Pb collisions can be explained as due to the occurrence of a new phase of strong J/psi absorption, which sets in when the number of nucleon-nucleon collisions at a spatial point exceeds about 4 and corresponds to a local energy density of about 3.4 GeV/fm**3.
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