论文标题
经典与量子校正以在弱耦合的夸克 - 胶状等离子体中射流扩展
Classical vs quantum corrections to jet broadening in a weakly-coupled Quark-Gluon Plasma
论文作者
论文摘要
横向动量扩展系数$ \ hat {q} $可获得软，经典和辐射的量子校正。前者负责较大的O（g）校正，而后者则以相对顺序$α_s$输入，但通过在热波长上的介质长度的双对数增强。我们分析了弱耦合的夸克 - 胶状等离子体的辐射校正。我们发现，动态振荡的热种群改变了边界并减少了双层相位空间的大小。它还提供了新的尺寸对数校正。我们还展示了一旦辐射的Gluon变得足够柔软，量子，双层和经典的软相位如何平稳地连接。最后，我们讨论了测定谐波振荡器近似之外辐射校正的途径。
The transverse momentum broadening coefficient $\hat{q}$ receives both soft, classical and radiative, quantum corrections. The former are responsible for a large O(g) correction, whereas the latter enter at relative order $α_s$, but are enhanced by a double logarithm of the length of the medium over the thermal wavelength. We analyze radiative corrections for a weakly-coupled quark-gluon plasma. We find that a thermal population of dynamical gluons changes the boundaries and reduces the size of the double-logarithmic phase space. It also provides new subdominant logarithmic corrections. We also show how the quantum, double-logarithmic and classical, soft phase spaces are smoothly connected once the radiated gluon becomes soft enough. Finally, we discuss a pathway to a determination of radiative corrections beyond the harmonic-oscillator approximation.
