Inflation from fermions with curvature-dependent mass
Abstract
A model of inflation realization driven by fermions with curvature-dependent mass is studied. Such a term is derived from the Covariant Canonical Gauge Theory of gravity (CCGG) incorporating Dirac fermions. We obtain an initial de Sitter phase followed by a successful exit, and moreover, we acquire the subsequent thermal history, with an effective matter era, followed finally by a dark-energy epoch. This behavior is a result of the effective `weakening' of gravity at early times, due to the decreased curvature-dependent fermion mass. Through the perturbation level, we obtain the scalar spectral index and the tensor-to-scalar ratio, which are in agreement with the Planck observations. The efficiency of inflation from fermions with curvature-dependent mass, at both the background and perturbation level, reveals the capabilities of the scenario and makes it a good candidate for the description of nature.
Keywords
Cite
@article{arxiv.1905.03731,
title = {Inflation from fermions with curvature-dependent mass},
author = {David Benisty and Eduardo I. Guendelman and Emmanuel N. Saridakis and Horst Stoecker and Jurgen Struckmeier and David Vasak},
journal= {arXiv preprint arXiv:1905.03731},
year = {2019}
}
Comments
6 pages; 2 Fig; Accepted for publishing in Phys.Rev.D