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arXiv 0812.3839hep-ph
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在RHIC和LHC上的PDKEEPAAA物质热化

QCD Matter Thermalization at RHIC and LHC

Zhe Xu, Luan Cheng, Andrej El, Kai Gallmeister, Carsten Greiner

摘要:

利用微扰QCD激发的部分子级联,我们研究了RHIC和LHC能区中心重离子碰撞产生的部分子物质的动力学和化学平衡。两种类型的初始条件被选择。一种是利用PYTHIA事件发生器和Glauber几何由受伤核子模型产生的。另一种被认为是彩色玻璃冷凝物。我们发现,动力学平衡几乎是独立的所选择的初始条件,而有一个敏感的依赖化学平衡。热化的时间尺度在1到1.5 fm/c之间。从BAMPS计算得到的最终部分子横向能量与RHIC数据进行了比较,并估计为LHC能量。

英文摘要:

Employing the perturbative QCD inspired parton cascade, we investigate kinetic and chemical equilibration of the partonic matter created in central heavy ion collisions at RHIC and LHC energies. Two types of initial conditions are chosen. One is generated by the model of wounded nucleons using the PYTHIA event generator and Glauber geometry. Another is considered as a color glass condensate. We show that kinetic equilibration is almost independent on the chosen initial conditions, whereas there is a sensitive dependence for chemical equilibration. The time scale of thermalization lies between 1 and 1.5 fm/c. The final parton transverse energy obtained from BAMPS calculations is compared with the RHIC data and is estimated for the LHC energy.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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