Novel nonlinear kinetic terms for gravitons
General Relativity and Quantum Cosmology
2017-10-20 v4 High Energy Physics - Theory
Abstract
A set of novel derivative terms for spin-2 fields are proposed. They are the wedge products of curvature two-forms and vielbeins. In this work, we investigate the properties of novel two-derivative terms in the context of bi-gravity. Based on a minisuperspace analysis, we identify a large class of bi-gravity models where the Boulware-Deser ghost could be absent. We give a new perspective that Weyl Gravity and New Massive Gravity belong to this class of bi-gravity models involving novel derivative terms. In addition, we discuss the UV cut-off scales, dynamical symmetric conditions and novel higher-derivative terms.
Keywords
Cite
@article{arxiv.1508.03246,
title = {Novel nonlinear kinetic terms for gravitons},
author = {Wenliang Li},
journal= {arXiv preprint arXiv:1508.03246},
year = {2017}
}
Comments
19 pages, two columns, v3.1; a reference is added