Photon-Graviton Amplitudes from the Effective Action
Abstract
We report on the status of an ongoing effort to calculate the complete one-loop low-energy effective actions in Einstein-Maxwell theory with a massive scalar or spinor loop, and to use them for obtaining the explicit form of the corresponding M-graviton/N-photon amplitudes. We present explicit results for the effective actions at the one-graviton four-photon level, and for the amplitudes at the one-graviton two-photon level. As expected on general grounds, these amplitudes relate in a simple way to the corresponding four-photon amplitudes. We also derive the gravitational Ward identity for the 1PI one-graviton -- N photon amplitude.
Cite
@article{arxiv.1203.1689,
title = {Photon-Graviton Amplitudes from the Effective Action},
author = {F. Bastianelli and O. Corradini and J. M. Davila and C. Schubert},
journal= {arXiv preprint arXiv:1203.1689},
year = {2015}
}
Comments
9 pages, 2 figures, talk given by C. Schubert at "Supersymmetries and Quantum Symmetries - SQS`2011", JINR Dubna, July 18 - 23, 2011 (to appear in the Proceedings)