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arXiv 1904.01435hep-phhep-exnucl-exnucl-th
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损伤核子、夸克和夸克-双夸克发射函数与RHIC实验结果的比较

Wounded nucleon, quark and quark-diquark emission functions versus experimental results from RHIC

Michał Barej, Adam Bzdak, Paweł Gutowski

摘要:

利用受伤的核子、夸克和夸克-双夸克模型,我们从$\sqrt{s_{_{NN}}}=200$ GeV的d+Au碰撞的PHOBOS数据中提取了受伤的源辐射函数.我们应用这些模型计算了在相同能量下p+p,p+Al,p+Au,d+Au,$^3$ He+Au,Cu+Cu,Cu+Au,Au+Au和U+U碰撞的带电粒子多重数分布,并与PHOBOS和PHENIX合作组的实验数据进行了比较.在重核的对称碰撞中,所得到的分布在不同的模型中是不同的。另一方面,在非对称碰撞中,所有三种模型给出的分布基本相同。受伤的夸克-双夸克和夸克模型是在合理的协议与所有的调查系统的数据。

英文摘要:

Using the wounded nucleon, quark, and quark-diquark models, we extract the wounded source emission functions from the PHOBOS data for d+Au collisions at $\sqrt{s_{_{NN}}}=200$ GeV. We apply these models to compute charged particle multiplicity distributions as functions of pseudorapidity for p+p, p+Al, p+Au, d+Au, $^3$He+Au, Cu+Cu, Cu+Au, Au+Au, and U+U collisions at the same energy and compare them with experimental data from the PHOBOS and PHENIX collaborations. In symmetric collisions of heavy nuclei, the obtained distributions differ among the tested models. On the other hand, in asymmetric collisions, all three models give essentially the same distributions. The wounded quark-diquark and quark models are in reasonable agreement with data for all the investigated systems.

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