Energy and centrality dependence of rapidity densities at RHIC energies.
Energy and centrality dependence of rapidity densities at RHIC energies.
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DOI：
10.1103/physrevlett.86.3496
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发表时间：
2000-08
影响因子：
8.6
通讯作者：
Xin-Nian Wang;Mikols Gyulassy
中科院分区：
文献类型：
--
作者：
Xin-Nian Wang;Mikols Gyulassy
每个参与核子的带电多重性的能量和中心性依赖性被证明能够区分高能重离子碰撞中初始熵产生的最终状态饱和和固定尺度微扰 QCD 模型。能量依赖性用于测试初始条件下微型喷气组件的核增强，而中心性依赖性则提供了在 RHIC 能量下是否达到胶子饱和的关键测试。 HIJING模型预测每个参与者的快速密度随着中心性的增加而增加，而饱和模型预测本质上与中心性无关。
The energy and centrality dependence of the charged multiplicity per participant nucleon is shown to be able to differentiate between final state saturation and fixed scale perturbative QCD models of initial entropy production in high-energy heavy-ion collisions. The energy dependence is shown to test the nuclear enhancement of the minijet component of the initial conditions, while the centrality dependence provides a key test of whether gluon saturation is reached at RHIC energies. The HIJING model predicts that the rapidity density per participant increases with centrality, while the saturation model prediction is essentially independent of centrality.