String Theory Journal Club

In the last couple of decades, a lot of progress has been done in the computation of three-point funcitons in N=4 SYM. This is due to Minahan and Zarembo (hep-th/0212208), who noticed that computing anomalous dimensions is equivalent to the diagonalization of the Hamiltonian for certain spin chains. First I will discuss the computation of the structure constant at weak coupling and show that the result can be recast as a sum over partitions of the rapidities of the magnons. Then, I introduce a non-perturbative framework, called the “hexagon approach” to determine the structure constants. The content from the talk is based on a nice set of lecture notes by S. Komatsu (1710.03853 [hep-th]).