论文标题
手性培养基中的Bremsstrahlung：对伯特·赫特勒公式的异常磁贡献
Bremsstrahlung in chiral medium: anomalous magnetic contribution to the Bethe-Heitler formula
论文作者
论文摘要
我们研究了手性介质中的Photon Bremsstrahlung。手性介质对磁场的反应由手性磁电流$ j = b_0 b $描述，其中$ b_0 $是手性磁导率。该电流修改了在散射幅度中产生共振的光子分散关系。我们表明，谐振贡献与目标核的磁矩$μ$成正比。我们通过分析计算相应的横截面。我们认为，异常贡献通过因子$ b_0^2/γ^2 $增强，其中$γ$是与电磁场的手性磁性不稳定相关的共振的宽度。对光子光谱异常贡献的最显着特征是膝盖状结构在光子能量上的出现与$ b_0 $成比例。我们认为，异常术语的现象学意义取决于$ b_0 $与弹丸费米昂质量的比例。
We investigate photon bremsstrahlung in chiral media. The chiral medium response to the magnetic field is described by the chiral magnetic current $ j= b_0 B$, where $b_0$ is the chiral magnetic conductivity. This current modifies the photon dispersion relation producing a resonance in the scattering amplitude. We show that the resonant contribution is proportional to the magnetic moment $μ$ of the target nucleus. We analytically compute the corresponding cross section. We argue that the anomalous contribution is enhanced by a factor $b_0^2/Γ^2$, where $Γ$ is a width of the resonance related to the chiral magnetic instability of the electromagnetic field. The most conspicuous feature of the anomalous contribution to the photon spectrum is the emergence of the knee-like structure at photon energies proportional to $b_0$. We argue that the phenomenological significance of the anomalous terms depends on the magnitude of the ratio of $b_0$ to the projectile fermion mass.
