paper

Softly higher-derivative massive gravity

arXiv:2202.01154 · doi:10.1140/epjc/s10052-022-10681-7

Abstract

In this work, we study the higher-derivative massive gravity in -dimensional space-time with the mass term arisen due to a 2-brane embedded in a Minkowski spacetime. We consider the effect of a resonance mass term from the DGP braneworld model for the higher-derivative massive gravity. Moreover, we add the gravitational Chern-Simons and Ricci-Cotton terms to this model and evaluate the graviton propagator using a basis of Barnes-Rivers spin projectors. Using the obtained propagator, we proceed with discussing the consistency of the model, writing the dispersion relations, and analyzing causality and unitarity.

19 pages, matches the version published in EPJC

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