Journal Title: Nuclear Physics B
ISSN: 0550-3213 (Print); 1873-1562 (Online)
LCC Subject Category: Science: Physics: Nuclear and particle physics. Atomic energy. Radioactivity
Country of publisher: Netherlands
Language of fulltext: English
Full-text formats available: PDF, HTML
Abstract | Full Text
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.