Non-Gaussianity from Particle Production during Inflation

Figure 2

|𝜙̇|/(𝑀_𝑝𝑚) plotted against 𝑚𝑡 for 𝑔²=0.1 (where 𝑚=𝑉_,𝜙𝜙 is the effective inflaton mass). Time 𝑡=0 corresponds to the moment when 𝜙=𝜙₀ and 𝜒 particles are produced copiously. The solid red line is the lattice field theory result taking into account the full dynamics of rescattering and IR cascading while the dashed blue line is the result of a mean-field theory treatment which ignores rescattering [64]. The dot-dashed black line is the inflationary trajectory in the absence of particle creation.