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arXiv 1807.06181hep-phnucl-th
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介质诱导部分子级联中的普适夸克胶子比

Universal quark to gluon ratio in medium-induced parton cascade

Yacine Mehtar-Tani, Soeren Schlichting

摘要:

本文研究了高温QCD等离子体中高能夸克或胶子的辐射分裂。在惯性动量范围$T \ll ω\ll E$内,其中$E$表示原始硬部分子(喷流)的能量,$T$表示介质的温度,我们发现,由于底层部分子级联的湍流性质,软碎片的夸克与胶子之比趋于一个与初始条件无关的普适常数。我们讨论了这一结果对喷注猝灭物理和重离子碰撞中夸克-胶子等离子体离子体热化问题的意义。

英文摘要:

We investigate the radiative break-up of a highly energetic quark or gluon in a high-temperature QCD plasma. Within an inertial range of momenta $T \ll ω\ll E$, where $E$ denotes the energy of the original hard parton (jet) and $T$ the temperature of of the medium, we find that, as a result of the turbulent nature of the underlying parton cascade, the quark to gluon ratio of the soft fragments tends to a universal constant value that is independent of the initial conditions. We discuss implications of this result to jet quenching physics and the problem of thermalization of the quark-gluon plasma in heavy ion collisions.

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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