Minimal inflationary cosmologies and production of heavy dark matter (original) (raw)

Generalizing one of the author's recent paper on minimal Higgs inflation, we proposed and analyzed a large class of inflationary models with non-polynomial modification of the potential. The modification is done by introducing a single scale creating an infinite plateau for large inflaton field value. One can identify those class of potentials as a small dip at the origin of a constant one dimensional field space. Because of this large flat plateau, we find all the predictions are fitting extremely well with the recent observations made by PLANCK. We have extensively studied perturbative reheating phenomena specifically focusing on the production of dark matter heavier than the reheating temperature. We generalize the well known analysis of heavy dark matter production for general equation of state www of the oscillating inflaton field. However, at the end we consider effective equation of state w=(n−2)/(n+2)w = (n-2)/(n+2)w=(n−2)/(n+2) emerging form our model. Where, nnn is the index of the power law ...