论文标题
用重力波测试发条轴
Testing clockwork axion with gravitational waves
论文作者
论文摘要
我们研究了与发条轴相关的Peccei-Quinn（PQ）相变产生的重力波（GWS）。当尺寸6运算符包含在标量电势中时，PQ相变可以是一阶。 BBO和ALIA干涉仪可检测到$ 10^3-10^6 $ GEV范围内PQ相变的GWS。 Lisa和Taiji干涉仪可以从PQ Scale $ f \ lyssim 10^4 $ GEV探测GW，而GW $ f \ gtrsim 10^5 $ GEV的GW信号可以由接地的GW Observatories ET和CE检测到。我们发现参数空间$κ_M\ sim 0.06-0.001 $，$κ_l\ sim 0.04-0.001 $，以及$ \ varepsilon \ sim 0.1-0.01 $在规模上$ f = 10^5 $ gev，大多数参数区域在规模上$ f = 10^6 $ GEV，已由lig o2 cul o2 cul， LIGO O3和设计阶段可以进一步探测其余参数空间。我们表明，来自PQ量表$ f \ simeq 2 \ times 10^5 $ GEV的域壁上的GWS可以诱导Nanograv 12。5年观察到的随机信号。 LIGO O3运行有机会从该量表周围的一阶PQ相变中检测GW信号。
We investigate the gravitational waves (GWs) produced from the Peccei-Quinn (PQ) phase transition associated with the clockwork axion. The PQ phase transition can be first-order when the dimension-6 operator is included into the scalar potential. The GWs from the PQ phase transition at scale in the range of $10^3-10^6$ GeV are detectable for the BBO and ALIA interferometers. The LISA and Taiji interferometers can probe the GWs from the PQ scale $f\lesssim 10^4$ GeV, while the GW signals from the scale $f\gtrsim 10^5$ GeV can be detected by the ground-based GW observatories ET and CE. We find that the parameter space $κ_m\sim 0.06-0.001$, $κ_l\sim 0.04-0.001$, and $\varepsilon\sim 0.1-0.01$ at the scale $f=10^5$ GeV and most of the parameter regions at the scale $f=10^6$ GeV have been excluded by the LIGO O2 run. The LIGO O3 and design phases can further probe the remaining parameter space. We show that the GWs from the annihilation of domain walls with a PQ scale $f\simeq 2\times 10^5$ GeV can induce the stochastic signals indicated by the 12.5-year observation of NANOGrav. The LIGO O3 run has the opportunity of detecting the GW signals from the first-order PQ phase transition around this scale.
