论文标题
黑暗光子和引力波产生的分析研究
Analytic study of dark photon and gravitational wave production from axion
论文作者
论文摘要
当哈勃参数下降到其质量以下时，预计比$ 10^{-27} $ EV重的轴状场重。考虑到Chern-Simons与深色量规玻色子的耦合，在短时间间隔间隔通过速度共振不稳定性产生了大量的深色光子。然后产生的深色光子然后源引力张量模式导致手性重力波。通过此过程，可以间接探测耦合的轴向向下光子模型的大参数空间。在这项工作中，我们首先找到了速旋谐振状态下产生的暗光子的数量密度的分析表达。其次，通过使用马鞍点近似，我们根据质量，耦合和未对准角度找到了重力波谱的分析表达。我们的分析结果可用于对这些类型场景的观察分析。
Axion-like fields heavier than about $10^{-27}$eV are expected to oscillate in the radiation dominated epoch when the Hubble parameter drops below their mass. Considering the Chern-Simons coupling with a dark gauge boson, large amount of dark photons are produced during a short time interval through tachyonic resonance instability. The produced dark photons then source gravitational tensor modes leading to chiral gravitational waves. Through this process, one can indirectly probe a large parameter space of coupled axion-dark photon models. In this work we first find an analytic expression for the number density of the dark photons produced during the tachyonic resonance regime. Second, by using the saddle point approximation we find an analytic expression for the gravitational wave spectrum in terms of the mass, coupling and misalignment angle. Our analytic results can be used for the observational analysis of these types of scenarios.
