Constant-roll inflation from a fermionic field

TL;DR

This paper explores a fermionic field-driven inflation model with constant-roll dynamics, analyzing its compatibility with Planck CMB data and constraining its parameters for observational consistency.

Contribution

It introduces a non-minimally coupled fermionic inflation model within the constant-roll framework and assesses its observational viability against Planck data.

Findings

The model's predictions for r and n_s align with observations for specific parameter ranges.

Constraints on the coupling parameter ξ and the constant-roll parameter β are established.

The model is consistent with CMB data for N=60 e-folds and |ξ|=0.1.

Abstract

We study the inflationary period driven by a fermionic field which is non-minimally coupled to gravity in the context of the constant-roll approach. We consider the model for a specific form of coupling and perform the corresponding inflationary analysis. By comparing the result with the Planck observations coming from CMB anisotropies, we find the observational constraints on the parameters space of the model and also the predictions the model. We find that the values of $r$ and $n_{s}$ for $-1.5<\beta\leq-0.9$ are in good agreement with the observations when $|\xi|=0.1$ and $N=60$.