软介质中硬过程射流层析成像技术的发展前景
Prospects of Jet Tomography Using Hard Processes inside a Soft Medium
摘要：
“层析成像”一词通常用于研究介质性质的想法，即通过介质对穿过它的已知探针的改变来研究介质的性质。在超相对论重离子碰撞的背景下，在软体物质产生过程中发生的罕见的高横动量（p_T）过程可以被看作是一个断层探测器，只要能量尺度是这样的，即高p_T过程的修改可以被看作是一个断层探测器。T过程可以主要归因于部分子传播过程中与介质的相互作用。各种高p_T观测量已被建议用于层析成像，其中包括硬单强子抑制、双强子关联和γ-强子关联。在本文中，我们提出了一个模型研究的一些不同的可观测量在同一计算框架内评估的敏感性的可观测量的不同属性的介质，并讨论了获得层析成像信息的前景。
英文摘要：
The term 'tomography' is commonly applied to the idea of studying properties of a medium by the modifications this medium induces to a known probe propagating through it. In the context of ultrarelativistic heavy-ion collisions, rare high transverse momentum (p_T) processes taking place alongside soft bulk-matter production can be viewed as a tomographic probe as long as the energy scales are such that the modification of high p_T processes can be dominantly ascribed to interactions with the medium during the propagation of partons. Various high p_T observables have been suggested for tomography, among them hard single hadron suppression, dihadron correlations and gamma-hadron correlations. In this paper, we present a model study of a number of different observables within the same calculational framework to assess the sensitivity of the observables to different properties of the medium and discuss the prospects of obtaining tomographic information.
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