The Multi-Regge Limit from the Wilson Loop OPE

Understand

The finite remainder function for planar, color-ordered, maximally helicity violating scattering processes in N=4 super Yang-Mills theory possesses a non-vanishing multi-Regge limit that depends on the choice of a Mandelstam region.

• We analyze the combined multi-Regge collinear limit in all Mandelstam regions through an analytic continuation of the Wilson loop OPE.
• At leading order, the former is determined by the gluon excitation of the Gubser-Klebanov-Polyakov string.
• We illustrate the general procedure at the example of the heptagon remainder function at two loops.