Speaker
Alfredo Bonini
(BO)
Description
The gluon scattering amplitudes and the null polygonal Wilson loops in planar Super Yang-Mills N=4 are believed to be the same. Many tests have been done at the perturbative level, while at strong coupling the scattering amplitudes can be computed solving a minamal area problem, thanks to the AdS/CFT correspondence.
As for the Wilson loops, a variant of the well-known Operator Product Expansion has been developed enabling us to write it as a sum over the excitations on the GKP vacuum. Thanks to the integrability underlying the theory, we have been obtaining many exact results in a series of papers, mainly on the strong coupling limit. Among them, the computation of the
Wilson loop is recast into a system of TBA-like equations, finding agreement with the classical string result. In addition, a purely quantum
contribution of the same order of the classical one comes out of the blue by considering an ostensibly sub-dominant sector.
Primary authors
Alfredo Bonini
(BO)
Davide Fioravanti
(BO)
Marco Rossi
(CS)
Simone Piscaglia
