Enhancement of intermediate mass dileptons from expanding hot quark-gluon matter

被引：9
|
作者：
He, ZJ
Zhou, WJ
Jiang, WZ
Zhang, JJ
Liu, B
机构：
[1] Chinese Acad Sci, Inst Nucl Res, Shanghai 201800, Peoples R China
[2] CCAST, World Lab, Beijing 100080, Peoples R China
[3] Natl Lab Heavy Ion Accelerator, Ctr Theoret Nucl Phys, Lanzhou 730000, Peoples R China
[4] Chinese Acad Sci, Ctr Comp, Shanghai 200031, Peoples R China
[5] Acad Sinica, Inst High Energy Phys, Beijing 100039, Peoples R China
来源：
PHYSICS LETTERS B | 2000年 / 495卷 / 3-4期
基金：
中国国家自然科学基金;
关键词：
D O I：
10.1016/S0370-2693(00)01265-X
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
A study of the production of intermediate mass dileptons from the quark phase and hadronic interactions as well as nonthermal contributions (Drell-Yan pairs, charmed hadronic decays) in the initial stage has been carried out based on a relativistic hydrodynamic model describing the evolution of a quark-gluon matter fire-cylinder. We find that due to the influence of the phase boundary on the evolution of the quark-gluon matter system and the high initial temperature of the quark-gluon matter produced at RHIC energies, the contribution of the quark phase to dileptons is obviously enhanced and is more important than those from hadronic interactions and even is comparable with those from non-thermal contributions, It is shown that the enhancement of intermediate mass dileptons is a possible signature for the quark-gluon matter formation in heavy ion collisions at RHIC energies. (C) 2000 Published by Elsevier Science B.V.
引用
收藏
页码：317 / 322
页数：6
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