Review of Local Non-Gaussianity from Multifield Inflation

Table 1

Table showing some initial conditions for the hybrid inflation model that lead to large levels of non-Gaussianity. The table shows the parameter 𝑟̃, the bispectrum and the trispectrum nonlinearity parameters, the spectral index and tensor-to-scalar ratio. They are evaluated when the number of e-foldings from the end of inflation is 𝑁_𝑘=60. The trispectrum parameters 𝜏_NL and 𝑔_NL are defined and calculated in Section 6.1.

𝜂𝜑𝜑	𝜂𝜒𝜒	𝜑∗	𝜒∗	𝑟̃	𝑓NL	𝜏NL	𝑔NL	𝑛𝜁−1	𝑟
0.04	−0.04	1	6.8×10^−5	1	−123	4.4×10^4	−33	0	0.006
0.04	−0.04	1	1.5×10^−4	5	−68	8×10^3	−24	−0.05	0.002
0.08	0.01	1	0.0018	1	9.27	247	0.77	0.09	0.026
0.02	−0.04	1	0.00037	1	−11.1	357	−2.6	−0.02	0.002
−0.01	−0.09	1	3×10^−6	0.16	−132	1.8×10^5	−44	−0.04	0.0007
0.06	−0.01	1	4.3×10^−4	0.1	−3	148	−0.2	0.11	0.026
0.01	−0.06	1	7.5×10^−6	0.04	−8	2.5×10^3	−2	0.01	0.0008