标题： 轴子类粒子的引力波探测探针 显示英文标题

标题： Gravitational wave probes of axion-like particles

摘要： 我们最近表明，当轴子及其类轴子粒子（ALPs）在早期宇宙中开始振荡时，可能会发出可观察到的随机引力波（GW）背景。 在这篇短文中，我们确定了未来引力波探测器可能探测到的ALP参数空间区域，包括地基和空间干涉仪以及脉冲星测时阵列。 有趣的是，这些实验有能力从下至上探测轴子，即在其他情况下未被约束的非常弱耦合区域。 此外，我们讨论了有限暗光子质量和动能混合对此机制的影响，以及轴子与标准模型场耦合的（不）敏感性。 我们得出结论，现实的轴子和ALP情景确实可以通过未来的引力波实验进行探测，并提供用于进一步研究的信号模板。 显示英文摘要

摘要： We have recently shown that axions and axion-like particles (ALPs) may emit an observable stochastic gravitational wave (GW) background when they begin to oscillate in the early universe. In this note, we identify the regions of ALP parameter space which may be probed by future GW detectors, including ground- and space-based interferometers and pulsar timing arrays. Interestingly, these experiments have the ability to probe axions from the bottom up, i.e. in the very weakly coupled regime which is otherwise unconstrained. Furthermore, we discuss the effects of finite dark photon mass and kinetic mixing on the mechanism, as well as the (in)sensitivity to couplings of the axion to Standard Model fields. We conclude that realistic axion and ALP scenarios may indeed be probed by GW experiments in the future, and provide signal templates for further studies.