Mutated hilltop inflation revisited

Understand

In this work we re-investigate pros and cons of mutated hilltop inflation.

• Applying Hamilton-Jacobi formalism we solve inflationary dynamics and find that inflation goes on along the ${\cal W}_{-1}$ branch of the Lambert function.
• Depending on the model parameter mutated hilltop model renders two types of inflationary solutions: one corresponds to small inflaton excursion during observable inflation and the other describes large field inflation.
• The inflationary observables from curvature perturbation are in tune with the current data for a wide range of the model parameter.