Hadron production in nuclear collisions at RHIC and high density QCD
Hadron production in nuclear collisions at RHIC and high density QCD
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DOI：
10.1016/s0370-2693(01)00457-9
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发表时间：
2000-12
影响因子：
4.4
通讯作者：
D. Kharzeev;M. Nardi
中科院分区：
文献类型：
--
作者：
D. Kharzeev;M. Nardi
在高密度QCD的框架下，我们分析了在常规eikonal方法下RHIC带电粒子多重数的第一个结果。我们提取了源于“硬”(即与二元碰撞数成正比)过程的强子多重数的分数F；我们发现这一分数随着能量的增加而强劲增长：F(S=56GeV)≃22%，而F(S=130GeV)≃37%。这表明产生的颗粒密度迅速增加。我们概述了高密度QCD对强子产生的中心性、能量和原子序数的预测。令人惊讶的是，对于S=130GeV的强子多重数的中心性依赖关系，传统的eikonal方法和高密度QCD的预测看起来非常相似。
We analyze the first results on charged particle multiplicity at RHIC in the conventional eikonal approach and in the framework of high-density QCD. We extract the fraction F of the hadron multiplicity originating from “hard” (i.e., proportional to the number of binary collisions) processes; we find a strong growth of this fraction with energy: F( s =56 GeV )≃22% , while F( s =130 GeV )≃37% . This indicates a rapid increase in the density of the produced particles. We outline the predictions of high-density QCD for the centrality, energy, and atomic number dependence of hadron production. Surprisingly, the predictions of the conventional eikonal approach and of high-density QCD for centrality dependence of hadron multiplicity at s =130 GeV appear very similar.