]>Primordial Non-Gaussianity in the Cosmic Microwave Background : Figure 5
565248.fig.005a
(a)
565248.fig.005b
(b)
Figure 5: Plot of the function 𝐹 ( 1 , 𝑥 2 , 𝑥 3 ) 𝑥 2 2 𝑥 2 3 for the inflation with higher derivatives as given by (22) (a) and the ghost inflation as given by (23) (b). The figures are normalized to have value 1 for equilateral configurations 𝑥 2 = 𝑥 3 = 1 and set to zero outside the region 1 − 𝑥 2 ≤ 𝑥 3 ≤ 𝑥 2 . Here 𝑥 3 ≡ 𝑘 3 / 𝑘 1 and 𝑥 2 ≡ 𝑘 2 / 𝑘 1 . The figures are taken from Babich et al. 2003 [86].