Dissociation of J/ψ by mesons:: thermal versus nonequilibrium scenario

被引：12

作者：

Spieles, C

Vogt, R

Gerland, L

Bass, SA

Bleicher, M

Stöcker, H

Greiner, W

机构：

[1] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Nucl Sci, Berkeley, CA 94720 USA

[2] Univ Calif Davis, Dept Phys, Davis, CA 95616 USA

[3] Goethe Univ Frankfurt, Inst Theoret Phys, D-60054 Frankfurt, Germany

[4] Duke Univ, Dept Phys, Durham, NC 27708 USA

来源：

JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS | 1999年 / 25卷 / 12期

关键词：

D O I：

10.1088/0954-3899/25/12/305

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：

We study J/psi reaction kinetics in hadronic environments. The validity of a thermal meson gas ansatz is tested by confronting it with an alternative, nonequilibrium scenario. Heavy-ion collisions are simulated in the framework of the microscopic transport model, the ultrarelativistic quantum molecular dynamics model, taking into account the production of charmonium states through hard parton-parton interactions and subsequent rescattering with secondary hadrons assuming constant dissociation cross sections. The thermal gas and microscopic transport scenarios are shown to be very dissimilar. Estimates of J/psi survival probabilities based on thermal models of co-mover interactions in heavy-ion collisions are therefore questionable.

引用

页码：2351 / 2359

页数：9

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