### Two-loop gravity amplitudes from four dimensional unitarity

David Dunbar , Guy R. Jehu, Warren Perkins

Physical Review D, Volume: 95, Issue: 4

Swansea University Authors:

• PDF | Accepted Manuscript

DOI (Published version): 10.1103/PhysRevD.95.046012

Abstract

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...

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Published in: Physical Review D 2470-0010 2470-0029 2017 https://cronfa.swan.ac.uk/Record/cronfa31619 No Tags, Be the first to tag this record!
Abstract: 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. College of Science 4