Nonsinglet pentagons and NMHV amplitudes

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30 Scopus citations

Abstract

Scattering amplitudes in maximally supersymmetric gauge theory receive a dual description in terms of the expectation value of the super Wilson loop stretched on a null polygonal contour. This makes the analysis amenable to nonperturbative techniques. Presently, we elaborate on a refined form of the operator product expansion in terms of pentagon transitions to compute twist-two contributions to NMHV amplitudes. To start with, we provide a novel derivation of scattering matrices starting from Baxter equations for flux-tube excitations propagating on magnon background. We propose bootstrap equations obeyed by pentagon form factors with nonsinglet quantum numbers with respect to the R-symmetry group and provide solutions to them to all orders in 't Hooft coupling. These are then successfully confronted against available perturbative calculations for NMHV amplitudes to four-loop order.

Original languageEnglish (US)
Pages (from-to)493-554
Number of pages62
JournalNuclear Physics B
Volume896
DOIs
StatePublished - Jul 1 2015

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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