Analytic structure of the 8-point scattering amplitude in multi-Regge kinematics in N=4 SYM: conformal Regge pole and Regge cut contributions

TL;DR

This paper analyzes the analytic structure of 2->6 scattering amplitudes in N=4 SYM, revealing new features like the 3-Reggeon cut and double 2-Reggeon cuts in multi-Regge kinematics.

Contribution

It extends previous work by computing the Regge cut contributions for 2->6 processes in all kinematic regions, highlighting new analytic features.

Findings

Identification of the 3-Reggeon cut in 2->6 amplitudes

Discovery of the product of two 2-Reggeon cut contributions

Extension of analytic structure analysis to all kinematic regions

Abstract

Continuing our investigations of the analytic structure of the 2->n scattering amplitudes in the planar limit of N=4 SYM in multi-Regge kinematics we compute, in all kinematic regions, the Regge cut contributions of the 2->6 process in leading order. Compared to previous studies of the 2->4 and the 2->5 processes we encounter two new features: the 3-reggon cut and the product of two 2-reggeon cut contributions.