Phenomenology of SUGRA extensions of the Starobinsky model

摘要

We analyze Bl-extended model in a complete form and compare the predictions with that of Starobinsky model. Under the parameter constraints in Planck 2018, we find that the dynamics of the whole inflation process described by BI-extended and Starobinsky models are nearly the same, even though there are some differences in the regions out of inflation. We also find the scales of parameters in BI-extended model and inflaton values at the first horizon crossing required to implement inflation. The changes of (n(s), r) fingerprints of BI-extended model and that of evolutions of inflaton field due to the variations of relevant parameters are also investigated. (C) 2019 Elsevier Inc. All rights reserved.