Non-Gaussianity and Statistical Anisotropy from Vector Field Populated Inflationary Models

Figure 3

Plot of 𝑟_𝑛≡Θ(𝑥₂−𝑥₃)Θ(𝑥₃−1+𝑥₂)𝑥²₂𝑥²₃𝑅_𝑛(𝑥₂,𝑥₃), where we define 𝑅_𝑛=𝑘⁶₁𝐹_𝑛. The Heaviside step functions Θ help restricting the plot domain to the region (𝑥₂,𝑥₃) that is allowed for the triangle 𝑘₁+𝑘₂+𝑘₃=0 (in particular, we set 𝑥₃<𝑥₂). We also set 𝑥^∗=1.

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