论文标题
碰撞能量损失和手性磁效应
Collisional energy loss and the Chiral Magnetic Effect
论文作者
论文摘要
介质中快速粒子的碰撞能量损失主要是由于粒子的电磁场介质极化。 Cherenkov辐射将一小部分的能量带走。在手性培养基中，由于与磁场成比例的异常电流诱导，对能量损失有额外的贡献。它导致粒子主要以\ emph {Mathal} Cherenkov辐射的形式失去能量。我们采用经典的电动力学，足以在各种粒子能量中足以计算同质性手性等离子体中的快速粒子碰撞能量损失，并将结果应用于夸克 - 格鲁恩等离子体和WEYL半含量。在后来的情况下，在紫外线和X射线区域中，光子光谱得到了强烈的增强，这使其可以接受实验研究。我们的主要观察结果是，虽然非手续介质中的碰撞能量损失是一种缓慢的，最多是对数的能量$ e $的功能，但当忽略后坐后，手性Cherenkov辐射与$ e^2 $成正比，并在考虑到$ $时。
Collisional energy loss of a fast particle in a medium is mostly due to the medium polarization by the electromagnetic fields of the particle. A small fraction of energy is carried away by the Cherenkov radiation. In chiral medium there is an additional contribution to the energy loss due to induction of the anomalous current proportional to the magnetic field. It causes the particle to lose energy mostly in the form of the \emph{chiral} Cherenkov radiation. We employ classical electrodynamics, adequate in a wide range of particle energies, to compute the collisional energy loss by a fast particle in a homogenous chiral plasma and apply the results to Quark-Gluon Plasma and a Weyl semimetal. In the later case photon spectrum is strongly enhanced in the ultraviolet and X-ray regions which makes it amenable to experimental investigation. Our main observation is that while the collisional energy loss in a non-chiral medium is a slow, at most logarithmic, function of energy $E$, the chiral Cherenkov radiation is proportional to $E^2$ when the recoil is neglected and to $E$ when it is taken into account.
