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arXiv 0911.4696hep-ph
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受伤核子模型中重核碰撞的前向-后向多重数涨落

Forward-backward multiplicity fluctuations in heavy nuclei collisions in the wounded nucleon model

Adam Bzdak, Krzysztof Wozniak

摘要:

利用受伤核子模型研究了PHOBOS合作组在sqrt(sNN)=200 GeV的Au+Au碰撞中测量到的前向-后向多重数涨落。Au+Au碰撞中相对于基本p+p相互作用的前向-后向涨落的增强在该模型中由单个受伤核子产生的粒子的赝快度密度的不对称形状和碰撞核中受伤核子数目的涨落来解释。损伤核子模型比HIJING、AMPT和UrQMD模型更好地描述了这些实验数据。

英文摘要:

We use the wounded nucleon model to study the forward-backward multiplicity fluctuations measured by the PHOBOS Collaboration in Au+Au collisions at sqrt(s_NN)=200 GeV. The enhancement of forward-backward fluctuations in Au+Au collisions with respect to the elementary p+p interactions is in this model explained by the asymmetric shape of the pseudorapidity density of produced particles from a single wounded nucleon and the fluctuations of the number of wounded nucleons in the colliding nuclei. The wounded nucleon model describes these experimental data better than the HIJING, AMPT or UrQMD models do.

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