Perturbative Gravity from QCD Amplitudes
High Energy Physics - Theory
2009-10-31 v2 General Relativity and Quantum Cosmology
Abstract
We demonstrate that QCD gluon amplitudes can be used to construct a Lagrangian for gravity. This procedure makes use of perturbative `squaring' relations between gravity and gauge theory that follow from string theory. We explicitly carry out the construction for up to five-point interactions and discuss a set of field variables in the Einstein-Hilbert Lagrangian for interpreting the Lagrangian obtained from QCD. A spin-off from our analysis is that it can be used to provide simpler tree-level gravity Feynman rules than for conventional gauges.
Cite
@article{arxiv.hep-th/9904026,
title = {Perturbative Gravity from QCD Amplitudes},
author = {Z. Bern and A. K. Grant},
journal= {arXiv preprint arXiv:hep-th/9904026},
year = {2009}
}
Comments
12 pages, LaTeX, references added