DILEPTON RADIATION FROM NONEQUILIBRIZED PARTON MATTER PRODUCED IN ULTRA-RELATIVISTIC HEAVY-ION COLLISIONS

被引：30

作者：

KAMPFER, B

PAVLENKO, OP

机构：

[1] INST THEORET PHYS,KIEV 252143,UKRAINE,USSR

[2] TECH UNIV DRESDEN,KAI EV,INST THEORET PHYS,O-8027 DRESDEN,GERMANY

来源：

PHYSICS LETTERS B | 1992年 / 289卷 / 1-2期

关键词：

D O I：

10.1016/0370-2693(92)91373-H

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Dilepton radiation from parton (quark-gluon) matter, produced in ultrarelativistic nucleus-nucleus collisions, is calculated within a kinetic theory approach in order to study non-equilibrium effects. We investigate (i) the approach towards equilibrium in early collisions stages and (ii) the departure from a supposed equilibrium stage due to the subsequent longitudinal expansion. Independent of the details of the parton equilibration process the continuum dilepton rates from quark fusion in deconfined matter are found to exceed the Drell-Yan background in the J/psi region at RHIC and LHC energies. The appearence of higher mass dileptons depends on the degree of thermalization.

引用

页码：127 / 131

页数：5

共 18 条

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ASAKAWA M, 1991, PHYS REV D, V43, P287

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