Revisiting Scalar Tensor inflation by swampland criteria and Reheating

TL;DR

This paper examines scalar-tensor inflation models in light of swampland criteria, analyzing their compatibility with observations and exploring implications for reheating, e-folds, and reheating temperature.

Contribution

It provides a detailed analysis of scalar-tensor inflation models considering swampland constraints, highlighting how these criteria restrict model parameters and affect reheating.

Findings

Swampland criteria further limit inflation model parameters.

The model's parameters can satisfy observational data within constrained ranges.

Reheating analysis yields specific e-fold and temperature estimates.

Abstract

The scenario of the slow-roll inflation is studied in the frame of the scalar-tensor theory of gravity where the scalar field has a non-minimal coupling to the geometric part. After deriving the main dynamical and perturbation equations, the model is investigated in detail for different functions of the potential and the coupling function. Considering the consistency of the model with observational model results into specific ranges for the free constants of the model. Then, the obtained ranges are reconsidered to realize whether they satisfy the swampland criteria. It is found that the swampland criteria impose another limitation and reduce the ranges. Using the final outcomes for the free constants of the model, we briefly consider the reheating phase to find out about the number of e-fold for the phase and the reheating temperature.