Comparing energy loss and p⊥-broadening in perturbative QCD with strong coupling N=4 SYM theory☆
Comparing energy loss and p⊥-broadening in perturbative QCD with strong coupling N=4 SYM theory☆
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DOI：
10.1016/j.nuclphysa.2008.07.004
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发表时间：
2008-03
期刊：
影响因子：
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通讯作者：
F. Dominguez;C. Marquet;A. Mueller;Bin Wu;Bin Wu;B. Xiao
中科院分区：
文献类型：
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作者：
F. Dominguez;C. Marquet;A. Mueller;Bin Wu;Bin Wu;B. Xiao
我们将微扰 QCD 中的介质引起的能量损失和展宽与 SYM 理论的拖尾弦图进行了比较。我们考虑有限和无限范围的物质以及相对论性的重夸克，它们对应于在介质中或介质外部产生的夸克。当用适当的饱和动量表示时，我们在微扰 QCD 和 SYM 理论中发现了相同的能量损失参数形式。我们发现 QCD 中的展宽和 SYM 理论中的展宽之间存在简单的对应关系，尽管展宽在 SYM 理论中以辐射为主，而在微扰 QCD 中以多重散射为主。
We compare medium induced energy loss and-broadening in perturbative QCD with that of the trailing string picture of SYM theory. We consider finite and infinite extent matter as well as relativistic heavy quarks which correspond to those being produced in the medium or external to it. When expressed in terms of the appropriate saturation momentum, we find identical parametric forms for energy loss in perturbative QCD and SYM theory. We find simple correspondences between-broadening in QCD and in SYM theory although-broadening is radiation dominated in SYM theory and multiple scattering dominated in perturbative QCD.