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.
Details
- Nonsinglet Pentagons and NMHV Amplitudes
- Belitsky, Andrei (Author)
- College of Liberal Arts and Sciences (Contributor)
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Identifier TypeInternational standard serial numberIdentifier Value10.1016/j.nuclphysb.2015.05.002
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Identifier TypeInternational standard serial numberIdentifier Value0550-3213
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Identifier TypeInternational standard serial numberIdentifier Value1873-1562
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Belitsky, A. (2015). Nonsinglet pentagons and NMHV amplitudes. Nuclear Physics B, 896, 493-554. doi:10.1016/j.nuclphysb.2015.05.002