Charmonium suppression in lead-lead collisions:: Is there a break in the J/ψ cross section?

被引：86

作者：

Armesto, N

Capella, A

Ferreiro, EG

机构：

[1] Univ Hamburg, Inst Theoret Phys 2, D-22761 Hamburg, Germany

[2] Univ Paris Sud, Phys Theor & Hautes Energies Lab, F-91405 Orsay, France

来源：

PHYSICAL REVIEW C | 1999年 / 59卷 / 01期

关键词：

D O I：

10.1103/PhysRevC.59.395

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

In the framework of a model based an nuclear absorption plus comover interaction, we compute the E-T distribution of the J/psi in PbPb collisions at SPS and compare it with available NA50 data. Our analysis suggests that the existence of new physics (deconfinement phase transition) in the region E(T)less than or similar to 100 GeV is unlikely and that signals of new physics should rather be searched in the region E(T)greater than or similar to 100 GeV. The E-T dependence of the J/psi transverse momentum has been computed, At large E-T it turns out to be much flatter in the comover approach than in a phase transition framework. Estimates of the J/psi suppression at RHIC and LHC energies are also given. [S0556-2813(99)010011-8].

引用

页码：395 / 404

页数：10

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