Constraining Axion Inflation with Gravitational Waves across 29 Decades in Frequency
Constraining Axion Inflation with Gravitational Waves across 29 Decades in Frequency
复制标题
用 29 个十年频率的引力波约束轴子暴胀
DOI：
10.1103/physrevlett.124.171301
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发表时间：
2020
影响因子：
8.6
通讯作者：
Weiner, Zachary J.
中科院分区：
文献类型：
--
作者：
Adshead, Peter;Giblin, John T.;Pieroni, Mauro;Weiner, Zachary J.
我们表明，有效的规范预热后轴子膨胀产生的引力波一般有助于显着的相对论自由度的有效数量。我们表明，与现有的普朗克极限，重力波预热已经把最强的约束暴胀的可能轴向耦合阿贝尔规范场。我们证明，规范预热可以完全重新加热宇宙，无论暴胀的潜力。此外，我们量化的引力波生产的效率从模型到模型的变化，并表明它与张量标量比。特别是，当结合约束的张量-标量比的模型，将被检测到的下一代宇宙微波背景实验，约束从将探测或排除整个耦合制度的规范预热是有效的。
We demonstrate that gravitational waves generated by efficient gauge preheating after axion inflation generically contribute significantly to the effective number of relativistic degrees of freedom. We show that, with existing Planck limits, gravitational waves from preheating already place the strongest constraints on the inflaton’s possible axial coupling to Abelian gauge fields. We demonstrate that gauge preheating can completely reheat the Universe regardless of the inflationary potential. Further, we quantify the variation of the efficiency of gravitational wave production from model to model and show that it is correlated with the tensor-to-scalar ratio. In particular, when combined with constraints on models whose tensor-to-scalar ratios would be detected by next-generation cosmic microwave background experiments,, constraints fromwill probe or rule out the entire coupling regime for which gauge preheating is efficient.