Maximally supersymmetric amplitudes at infinite loop momentum

Jacob L. Bourjaily, Enrico Herrmann, Jaroslav Trnka

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8 Scopus citations

Abstract

We investigate the asymptotically large loop-momentum behavior of multiloop amplitudes in maximally supersymmetric (N=4, 8) quantum field theories in four dimensions. We check residue-theorem identities among color-dressed leading singularities in N=4 supersymmetric Yang-Mills theory to demonstrate the absence of poles at infinity of all n-point MHV amplitudes through three loops. Considering the same test for N=8 supergravity leads us to discover that this theory does support nonvanishing residues at infinity starting at two loops, and the degree of these poles grow arbitrarily with multiplicity. This causes a tension between simultaneously manifesting ultraviolet finiteness - which would be automatic at two loops for representation obtained by color-kinematic duality - and gauge invariance - which would follow from unitarity-based methods.

Original languageEnglish (US)
Article number066006
JournalPhysical Review D
Volume99
Issue number6
DOIs
StatePublished - Mar 15 2019

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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