On-Shell Perspectives on the Massless Limit of Massive Supergravity
High Energy Physics - Theory
2020-05-29 v1 General Relativity and Quantum Cosmology
Abstract
Massive gravity exhibits a famous discontinuity in its 2-point linearized amplitude for t-channel scattering of gravitational sources, in the limit. In essence, the source of this vDVZ discontinuity is in the failure of the zero-helicity mode to decouple in this limit. In [1], we showed how this result could be understood in the context of modern on-shell methods and, in particular, the BCFW construction. In this article, we provide a similar on-shell perspective to the equally interesting but lesser known discontinuity first discovered by Deser, Kay and Stelle in massive supergravity.
Cite
@article{arxiv.2005.14077,
title = {On-Shell Perspectives on the Massless Limit of Massive Supergravity},
author = {Daniel J Burger and Nathan Moynihan and Jeff Murugan},
journal= {arXiv preprint arXiv:2005.14077},
year = {2020}
}