PHI-ENHANCEMENT AND J-PSI SUPPRESSION IN NUCLEAR COLLISIONS BY RESCATTERING OF SECONDARY HADRONS

被引：55

作者：

KOCH, P ^{[1
]}

HEINZ, U ^{[1
]}

PISUT, J ^{[1
]}

机构：

[1] COMENIUS UNIV, DEPT THEORET PHYS, CS-84215 BRATISLAVA, CZECHOSLOVAKIA

来源：

PHYSICS LETTERS B | 1990年 / 243卷 / 1-2期

关键词：

D O I：

10.1016/0370-2693(90)90972-9

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We point out that recent indications from the NA38 Collaboration for an increase of the φ/(ω+ρ{variant}0) ratio in central 200A GeV O+U and S+U collisions at CERN give evidence for an approach to chemical equilibrium in these systems. Under the assumption (which is supported by previous theoretical work) that the J/ψ suppression found in the same experiment under similar kinematic conditions is due to final state absorption via rescattering in the dense collision zone, we solve the rate equations for φ-production and -absorption via secondary collisions in the reaction zone. Eliminating unknown geometrical parameters of the collision zone by using the J/ψ suppression data, we obtain a quantitative description of the measured φ enhancement. © 1990.

引用

页码：149 / 157

页数：9

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