论文标题
de Sitter空间中增强的软限制
Enhanced Soft Limits in de Sitter Space
论文作者
论文摘要
在平坦的空间中，由于隐藏对称性的存在，某些标量有效场理论的散射幅度表现出增强的软限制。在本文中，我们表明，这种现象扩展到De Sitter空间中的波函数系数。使用在接触图上作用的边界保形发电机来使用表示，我们发现，增强的软限制可以固定与最近来自隐藏对称性的Lagrangians一致的质量和四点耦合（包括曲率校正）。然后，可以使用引导程序可以修复更高点的耦合，我们在六个点上说明。我们还讨论了在De Sitter空间中对双副本的影响。
In flat space, the scattering amplitudes of certain scalar effective field theories exhibit enhanced soft limits due to the presence of hidden symmetries. In this paper, we show that this phenomenon extends to wavefunction coefficients in de Sitter space. Using a representation in terms of boundary conformal generators acting on contact diagrams, we find that imposing enhanced soft limits fixes the masses and four-point couplings (including curvature corrections) in agreement with Lagrangians recently derived from hidden symmetries. Higher-point couplings can then be fixed using a bootstrap procedure which we illustrate at six points. We also discuss implications for the double copy in de Sitter space.
