论文标题
来自基本轴心动力学的重力波
Gravitational Waves from Fundamental Axion Dynamics
论文作者
论文摘要
最近制定了一种完全渐近的QCD轴模型，其中所有耦合在无限能量极限中流向零。这种基本理论的一个非常有趣的特征是能够预测一些低能可观察到的能力，例如额外的费米和标量的质量。在这里，我们发现并研究了参数空间的一个区域，其中Peccei-Quinn（PQ）对称性通过Coleman-Weinberg机制机械折断。这导致了一个更具预测性的框架：轴心部门仅具有两个独立参数（PQ对称性量表和QCD量规耦合）。特别是，我们表明PQ相变是强烈的一阶，并且可以在未来检测器的范围内产生重力波。模型的预测性导致相变（例如其持续时间和成核温度）和PQ对称性断裂量表和QCD量规耦合的重力波谱的刚性依赖性。
A totally asymptotically free QCD axion model, where all couplings flow to zero in the infinite energy limit, was recently formulated. A very interesting feature of this fundamental theory is the ability to predict some low-energy observables, like the masses of the extra fermions and scalars. Here we find and investigate a region of the parameter space where the Peccei-Quinn (PQ) symmetry is broken quantum mechanically through the Coleman-Weinberg mechanism. This results in an even more predictive framework: the axion sector features only two independent parameters (the PQ symmetry breaking scale and the QCD gauge coupling). In particular, we show that the PQ phase transition is strongly first order and can produce gravitational waves within the reach of future detectors. The predictivity of the model leads to a rigid dependence of the phase transition (like its duration and the nucleation temperature) and the gravitational wave spectrum on the PQ symmetry breaking scale and the QCD gauge coupling.
