标题： 引力波探测类轴子粒子 显示英文标题

标题： Gravitational wave probes of axion-like particles

摘要： 我们最近表明，当轴子和类轴子粒子（ALPs）在早期宇宙中开始振荡时，可能会发射可观察的随机引力波（GW）背景。 在本说明中，我们确定了未来引力波探测器可能探测的ALP参数空间，包括地面和空间干涉仪以及脉冲星计时阵列。 有趣的是，这些实验有能力从下至上探测轴子，即探测其他情况下未受约束的非常弱耦合 regime。 此外，我们讨论了有限暗光子质量和动能混合对这一机制的影响，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情景在未来确实可能被引力波实验探测，并提供了信号模板以供进一步研究。 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.