Collisional energy loss above the critical temperature in QCD
Collisional energy loss above the critical temperature in QCD
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DOI：
10.1016/j.physletb.2014.01.043
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发表时间：
2013-12
影响因子：
4.4
通讯作者：
Shu Lin;R. Pisarski;V. Skokov
中科院分区：
文献类型：
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作者：
Shu Lin;R. Pisarski;V. Skokov
在量子色动力学（QCD）中，我们计算了临界温度以上重夸克的碰撞能量损失。我们在半夸克胶子等离子体中工作，假设该区域由非平凡的热威尔逊线的完整性所支配。相对于微扰论中首阶的结果，在耦合常数一定的情况下，我们一般发现碰撞能量损失被Polyakov环的幂抑制，l< 1。对于环的小值，当重夸克从轻夸克散射时，这种抑制是线性的，而当重夸克从胶子散射或康普顿散射时，这种抑制是二次的。
We compute the collisional energy loss for a heavy quark above the critical temperature in Quantum ChromoDynamics (QCD). We work in the semi Quark–Gluon Plasma, which assumes that this region is dominated by the non-trivial holonomy of the thermal Wilson line. Relative to the result of leading order in perturbation theory, at a fixed value of the coupling constant we generically find that collisional energy loss is suppressed by powers of the Polyakov loop, l< 1. For small values of the loop, this suppression is linear when the heavy quark scatters off of light quarks, and quadratic when the heavy quark scatters off of gluons, or for Compton scattering.