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arXiv 2011.06522hep-phnucl-th
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从软辐射到硬辐射:多重散射在介质诱导胶子发射中的作用

From soft to hard radiation: the role of multiple scatterings in medium-induced gluon emissions

Carlota Andres, Fabio Dominguez, Marcos Gonzalez Martinez

摘要:

正确理解介质诱导胶子发射的物理特性对于描述极端条件下强相互作用物质的性质至关重要。在这方面,许多理论上的努力已经指向获得分析计算,这可能有助于我们辨别的基础物理图片和不同制度的主导动力学。这些分析方法依赖于近似的有效性进行分析,在这里通过比较他们的结果与最近开发的数值评估,其中包括多个散射的所有阶recrimation。更具体地说,通过定量地比较能谱和速率,我们观察到三种不同的状态-每个都有相应的物理图像-从方程中自然出现:其中发射过程由单个硬散射主导的高能区,其中多个散射之间的相干效应成为基本的中能区,以及低能量区域,其中动力学再次由单次散射主导,但是其中由于没有任何进一步散射的概率(其通过虚项的重新计算获得)而必须包括抑制因子。

英文摘要:

A proper understanding of the physics of medium-induced gluon emissions is known to be of critical importance to describe the properties of strongly interacting matter under extreme conditions. In this regard, many theoretical efforts have been directed towards obtaining analytical calculations which might help us discerning the underlying physical picture and the dominant dynamics for different regimes. These analytical approaches rely on approximations whose validity is analyzed here by comparing their results with a recently developed numerical evaluation which includes all-order resummation of multiple scatterings. More specifically, by quantitatively comparing the energy spectrum and rates, we observe that three different regimes -- each with its corresponding physical picture -- emerge naturally from the equations: the high-energy regime where the emission process is dominated by a single hard scattering, the intermediate-energy regime where coherence effects among multiple scatterings become fundamental, and the low-energy regime where the dynamics is again dominated by a single scattering but where one must include the suppression factor due to the probability of not having any further scatterings (which is obtained through the resummation of virtual terms).

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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