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arXiv 2007.00005hep-phastro-ph.COgr-qchep-th
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基本轴子动力学中的引力波

Gravitational Waves from Fundamental Axion Dynamics

Anish Ghoshal, Alberto Salvio

摘要:

最近提出了一个完全渐近自由的QCD轴子模型,在这个模型中,所有的耦合在无限能量极限下都趋于零。这个基本理论的一个非常有趣的特征是能够预测一些低能的可观测量,比如额外费米子和标量的质量。在这里,我们发现和调查的参数空间的区域中的Peccei-Quinn(PQ)对称性被打破量子力学通过科尔曼-温伯格机制。这导致了一个更具有预测性的框架:轴子扇区只有两个独立的参数(PQ对称性破缺标度和QCD规范耦合)。特别是,我们表明,PQ相变是强烈的一阶,可以产生引力波的范围内,未来的探测器。该模型的可预测性导致相变(如其持续时间和成核温度)和引力波谱对PQ对称破缺标度和QCD规范耦合的严格依赖。

英文摘要:

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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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