Measuring spectral distortions (SDs) of the cosmic microwave background (CMB) will provide new constraints on previously unexplored scales of the primordial power spectrum, allowing us to extend the probed parameter space by several orders of magnitude in k-space, which could have significant implications in the context of primordial black holes and gravitational waves, among others. Here we discuss how various models of inflation can be tightly constrained by the combination of current and future CMB SD and anisotropy experiments. In particular, we investigate the constraining power of SD experiments such as FIRAS, PIXIE, and PRISM in conjunction with CMB anisotropy probes such as Planck or CMB-S4 plus LiteBIRD. Building on the latest version of the Boltzmann solver class (v3.0), here we also consistently marginalize over the possible galactic and extra-galactic foregrounds for the SD missions. With this numerical setup, we are able to realistically forecast the improvements that the increased lever-arm provided by the addition of the various SD missions will bring for several combinations of the aforementioned experiments. As a result, in all considered models we observe that SDs provide a highly significant tightening of the constraints by up to 640%, and increase the figure of merit up to a factor of around 1600.

测量宇宙微波背景（CMB）的频谱畸变（SD），将对以前未探索的原始功率谱尺度提供新的约束，从而使我们能够将探测到的参数空间扩展到k空间中几个数量级，这可能会产生重大影响。原始黑洞和引力波等方面的影响。在这里，我们讨论了如何通过当前和未来的CMB SD和各向异性实验的组合来严格约束各种通胀模型。特别地，我们结合CMB各向异性探针（例如Planck或CMB-S4加上LiteBIRD）来研究SD实验（例如FIRAS，PIXIE和PRISM）的约束力。以最新版本的Boltzmann求解器类（v3.0）为基础，在这里，我们还始终将SD任务可能在银河系和银河系外的前景边缘化。通过此数值设置，我们能够现实地预测出由于增加了各种SD任务而增加的杠杆臂将为上述实验的几种组合带来的改进。结果，在所有考虑的模型中，我们观察到SD可以将约束显着提高多达640％，并将品质因数提高到1600左右。