WITTMANN, R and HEINZ, U (1993) COLLISION DISSOCIATION OF HEAVY QUARKONIA IN DENSE PARTONIC SYSTEMS. ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS, 59 (1). pp. 77-83. ISSN 0170-9739,
Full text not available from this repository.Abstract
The influence of collisions in a hot partonic medium on the formation of heavy quarkonia is investigated. We find that the initial color octet propagation of QQBAR pairs created in nuclear collisions leads to a large cross section for collision dissociation even before Debye screening of the quarkonium potential in the color singlet final state becomes effective. This leads to a sizeable suppression of quarkonium states in addition to previously considered effects. The concept of a quarkonium ''formation time'', during which the QQBAR pair is not affected by the surrounding medium, is shown to be incorrect. In particular, we argue that the gamma resonance will always be suppressed in nuclear collisions, contrary to recent suggestions that an unsuppressed gamma state might signal quarkgluon plasma formation.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | NUCLEUS NUCLEUS COLLISIONS; GLUON-PLASMA FORMATION; J/PSI FORMATION TIME; J-PSI SUPPRESSION; ION COLLISIONS; ENHANCEMENT; MOMENTUM; DEPENDENCE; MATTER; STATES; |
| Depositing User: | Dr. Gernot Deinzer |
| Last Modified: | 19 Oct 2022 08:42 |
| URI: | https://pred.uni-regensburg.de/id/eprint/53914 |
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