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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.
- Belitsky, Andrei (Author)
- College of Liberal Arts and Sciences (Contributor)
Belitsky, A. (2015). Nonsinglet pentagons and NMHV amplitudes. Nuclear Physics B, 896, 493-554. doi:10.1016/j.nuclphysb.2015.05.002
- 2018-02-27 02:28:44
- 2021-12-07 01:47:15
- 2 years 11 months ago