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arXiv 0903.2255nucl-thhep-ph
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通过喷流簇射沉积到QCD介质中的能量和动量

Energy and momentum deposited into a QCD medium by a jet shower

G. -Y. Qin, A. Majumder, H. Song, U. Heinz

备注：
4 pages, 3 figures, revtex4, intro modified, typos corrected
发表信息：
Phys.Rev.Lett.103:152303,2009
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摘要：

硬部分子在通过致密QCD介质时会因辐射和弹性散射而损失能量。辐射贡献在介质中的沉积需要辐射胶子的再散射。我们计算的总能量损失和它的沉积到介质中自洽在同一形式主义，假设探针和介质之间的微扰相互作用。控制硬部分子能量损失的相同输运系数决定了能量如何沉积到介质中;一旦前者已经计算或从实验能量损失数据中提取，这允许后者的参数自由计算。我们计算它们的硬热环（HTL）近似微扰介质。假设沉积的能量动量在短的弛豫时间后平衡，我们计算介质的流体动力学响应，并获得一个圆锥形图案，强烈增强淋浴。

英文摘要：

Hard partons moving through a dense QCD medium lose energy by radiative emissions and elastic scatterings. Deposition of the radiative contribution into the medium requires rescattering of the radiated gluons. We compute the total energy loss and its deposition into the medium self-consistently within the same formalism, assuming perturbative interaction between probe and medium. The same transport coefficients that control energy loss of the hard parton determine how the energy is deposited into the medium; this allows a parameter free calculation of the latter once the former have been computed or extracted from experimental energy loss data. We compute them for a perturbative medium in hard thermal loop (HTL) approximation. Assuming that the deposited energy-momentum is equilibrated after a short relaxation time, we compute the medium's hydrodynamical response and obtain a conical pattern that is strongly enhanced by showering.

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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