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arXiv 1104.2295hep-phnucl-th
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超相对论重离子碰撞中重夸克的椭圆流和能量损失

Elliptic flow and energy loss of heavy quarks in ultra-relativistic heavy ion collisions

Jan Uphoff, Oliver Fochler, Zhe Xu, Carsten Greiner

摘要:

利用多部分子散射的部分子输运模型波尔兹曼方法(BAMPS)研究了超相对论性重离子碰撞中重夸克的时空传播。在这个模型中,重夸克通过二元散射与部分子介质相互作用。这些相互作用的截面是用首阶微扰QCD计算的,但其特征是在硬热环近似下得到的更精确的德拜屏蔽,并服从耦合的运行。在这个框架内的椭圆流和重夸克的核修改因子计算RHIC和LHC能量和现有的实验数据进行比较。据发现,二进制散射单独不能再现的数据,因此,辐射校正必须考虑在内。

英文摘要:

The space-time propagation of heavy quarks in ultra-relativistic heavy ion collisions is studied within the partonic transport model Boltzmann Approach of MultiParton Scatterings (BAMPS). In this model heavy quarks interact with the partonic medium via binary scatterings. The cross sections for these interactions are calculated with leading order perturbative QCD, but feature a more precise Debye screening derived within the hard thermal loop approximation and obey the running of the coupling. Within this framework the elliptic flow and the nuclear modification factor of heavy quarks are computed for RHIC and LHC energies and compared to available experimental data. It is found that binary scatterings alone cannot reproduce the data and, therefore, radiative corrections have to be taken into account.

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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