论文标题
电磁背景的QCD中的动态尺度异常转运
Dynamic scale anomalous transport in QCD with electromagnetic background
论文作者
论文摘要
我们根据DILATON有效理论讨论了QCD中量表异常引起的异常转运的现象学意义。比例异常的电流以完全类似于弯曲时空背景引起的共形转运电流的方式出现，或者在Dirac和Weyl Semimetals中的Nernst电流 - 这两种当前形式均与“ Weyl Transformation”相等。我们专注于QCD强子相的空间均匀系统，预计将在QCD相变和热化后创建。我们发现EM场可以诱导动态振荡性DILATON场，进而诱导尺度异常电流。作为现象学的应用，我们评估了由动态尺度异常诱导的DILEPTON和DIPHOTON生产，发现这些作品包括与动态振荡性DiLATON相关的特征峰结构，可以在重离子碰撞中测试。我们还简要讨论了由非绝热DILATON振荡产生的不平衡粒子产生，该振动以所谓的速度预热机制的方式发生。
We discuss phenomenological implications of the anomalous transport induced by the scale anomaly in QCD coupled to an electromagnetic (EM) field, based on a dilaton effective theory. The scale anomalous current emerges in a way perfectly analogous to the conformal transport current induced in a curved spacetime background, or the Nernst current in Dirac and Weyl semimetals -- both current forms are equivalent by a "Weyl transformation". We focus on a spatially homogeneous system of QCD hadron phase, which is expected to be created after the QCD phase transition and thermalization. We find that the EM field can induce a dynamic oscillatory dilaton field which in turn induces the scale anomalous current. As the phenomenological applications, we evaluate the dilepton and diphoton productions induced from the dynamic scale anomalous current, and find that those productions include a characteristic peak structure related to the dynamic oscillatory dilaton, which could be tested in heavy ion collisions. We also briefly discuss the out-of-equilibrium particle production created by a nonadiabatic dilaton oscillation, which happens in a way of the so-called tachyonic preheating mechanism.
