Non-Gaussianity from Particle Production during Inflation

Figure 3

(a) shows a sample bump in the power spectrum with amplitude 𝐴_IR=2.5×10⁻¹⁰ which corresponds to a coupling 𝑔²∼0.01. The feature is located at 𝑘_IR=0.01Mpc⁻¹. This example represents a distortion of 𝒪(10%) as compared to the usual vacuum fluctuations and is consistent with the data at 2𝜎. (b) shows the CMB angular TT power spectrum for this example, illustrating that the distortion shows up mostly in the first peak.

(a)

(b)