AI 中文总结
该研究通过拉普拉斯空间表示解析求解多场暴胀中强混合下的宇宙对撞机问题，得到与数值结果吻合的双谱，发现信号更大且振幅随时间导数增长，确定了观测目标。
AI 中文摘要
曲率扰动与重场通过强混合耦合时，原初非高斯性达到最大值，这种混合过强无法用微扰方法处理。我们证明，多场暴胀中自然出现的该区域可通过我们近期提出的拉普拉斯空间表示解析求解，其中每个模式成为平面波的叠加，由单一核加权。由此得到的双谱为初等函数的快速收敛级数，与独立数值结果完全吻合。我们发现，强混合下的宇宙对撞机信号比普遍认为的更大，仅受常规玻尔兹曼抑制的一半；其振幅随相互作用中曲率扰动的时间导数数量进一步增长，从而确定最具前景的观测目标。
英文摘要
Primordial non-Gaussianities are at their largest when the curvature perturbation is coupled to a massive field by a mixing too strong to be treated perturbatively. We show that this regime, naturally reached in multifield inflation, is solved analytically by the Laplace-space representation we recently introduced, in which every mode becomes a superposition of plane waves weighted by a single kernel. The bispectrum then follows as a rapidly convergent series of elementary functions, in perfect agreement with independent numerical results. We find that the cosmological collider signal at strong mixing is larger than widely believed, with only half of the usual Boltzmann suppression. Its amplitude further grows with the number of time derivatives of the curvature perturbation in the interaction, singling out the most promising observational targets.
Comments5 pages + Supplemental Material, 1 figure
