# Two-loop gravity amplitudes from four dimensional unitarity

@article{Dunbar2017TwoloopGA,
title={Two-loop gravity amplitudes from four dimensional unitarity},
author={David C. Dunbar and Guy R. Jehu and Warren B. Perkins},
journal={Physical Review D},
year={2017},
volume={95},
pages={046012}
}
• Published 11 January 2017
• Physics
• Physical Review D
We compute the polylogarithmic parts of the two-loop four and five-graviton amplitudes where the external helicities are positive and express these in a simple compact analytic form. We use these to extract the $\ln(\mu^2)$ terms from both the four and five-point amplitudes and show that these match the same $R^3$ counterterm.
8 Citations

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