Understand
A model of multi-component hybrid inflation, dubbed multi-brid inflation, in which various observable quantities including the non-Gaussianity parameter f_{NL} can be analytically calculated was proposed recently.
- In particular, for a two-brid inflation model with an exponential potential and the condition that the end of inflation is an ellipse in the field space, it was found that, while keeping the other observational quantities within the range consistent with observations, large non-Gaussianity is possible for certain inflationary trajectories, provided that the ratio of the two masses is large.
- One might question whether the resulting large non-Gaussianity is specific to this particular form of the potential and the condition for the end of inflation.
- In this paper, we consider a model of multi-brid inflation with a potential given by an exponential function of terms quadratic in the scalar field components.
Reading the bibliography…