Possible Signatures of Inflationary Particle Content: Spin-2 Fields
Cosmology and Nongalactic Astrophysics
2017-11-01 v1 General Relativity and Quantum Cosmology
High Energy Physics - Theory
Abstract
We study the imprints of a massive spin-2 field on inflationary observables, and in particular on the breaking of consistency relations. In this setup, the minimal inflationary field content interacts with the massive spin-2 field through dRGT interactions, thus guaranteeing the absence of Boulware-Deser ghostly degrees of freedom. The unitarity requirement on spinning particles, known as Higuchi bound, plays a crucial role for the size of the observable signal.
Keywords
Cite
@article{arxiv.1708.01587,
title = {Possible Signatures of Inflationary Particle Content: Spin-2 Fields},
author = {Matteo Biagetti and Emanuela Dimastrogiovanni and Matteo Fasiello},
journal= {arXiv preprint arXiv:1708.01587},
year = {2017}
}
Comments
24 pages, 6 figures