How well can we really determine the scale of inflation
How well can we really determine the scale of inflation
复制标题
我们如何才能真正确定通货膨胀的规模
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
S. Watson
中科院分区：
文献类型：
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作者：
O. Ozsoy;K. Sinha;S. Watson
原始 B 模式的探测不仅被认为是暴胀存在的确凿证据，而且也是确定暴胀发生规模的一种方法。在本文中，我们批判性地重新研究了原始重力波的检测与通货膨胀规模之间的联系。我们考虑暴胀期间额外场和非绝热性的存在是否可能提供与准德西特真空竞争的原始 B 模式的额外来源。特别是，我们检查额外的来源是否可以提供主导信号，这可能导致对通货膨胀规模的误解。鉴于普朗克对非高斯性水平的限制，我们发现只有具有严格引力强度耦合的隐藏扇区才能提供可行的机制。所需的模型构建有些复杂，因此我们在使用 RR 轴子进行 IIB 型东方褶皱致密化的背景下讨论可能的 UV 完成。我们发现嵌入是可能的，并且可以通过致密几何来抑制危险的正弦校正。我们的主要结果是，即使当其他原始重力波源与暴胀子竞争时，正 B 模式检测仍然是暴胀规模的相对较好的指标。未来对非高斯性和 CMB 极化的约束将加强这一结论。
A detection of primordial B-modes has been heralded not only as a smoking gun for the existence of inflation, but also as a way to establish the scale at which inflation took place. In this paper we critically reinvestigate the connection between a detection of primordial gravity waves and the scale of inflation. We consider whether the presence of additional fields and non-adiabaticity during inflation may have provided an additional source of primordial B-modes competitive with those of the quasi-de Sitter vacuum. In particular, we examine whether the additional sources could provide the dominant signal, which could lead to a misinterpretation of the scale of inflation. In light of constraints on the level of non-Gaussianity coming from Planck we find that only hidden sectors with strictly gravitationally strength couplings provide a feasible mechanism. The required model building is somewhat elaborate, and so we discuss possible UV completions in the context of Type IIB orientifold compactifications with RR axions. We find that an embedding is possible and that dangerous sinusoidal corrections can be suppressed through the compactification geometry. Our main result is that even when additional sources of primordial gravity waves are competitive with the inflaton, a positive B-mode detection would still be a relatively good indicator of the scale of inflation. This conclusion will be strengthened by future constraints on both non-Gaussianity and CMB polarization.
影响因子：
6.5
作者：
Ade, P. A. R.;Aghanim, N.;Zonca, A.
通讯作者：
Zonca, A.
影响因子：
8.6
作者：
Ade, P. A. R.;Aikin, R. W.;Yoon, K. W.
通讯作者：
Yoon, K. W.