Helicity amplitudes for high-energy scattering

TL;DR

This paper introduces a gauge-invariant method for calculating tree-level helicity amplitudes with off-shell gluons in high-energy scattering, demonstrating its equivalence to Lipatov's effective action and showcasing its computational efficiency.

Contribution

It provides a new prescription for gauge-invariant helicity amplitude calculations that is equivalent to Lipatov's effective action, enhancing computational capabilities.

Findings

Method is gauge invariant and applicable to arbitrary processes.

Numerical calculations demonstrate computational potential.

Equivalent to Lipatov's effective action approach.

Abstract

We present a prescription to calculate manifestly gauge invariant tree-level helicity amplitudes for arbitrary scattering processes with off-shell initial-state gluons within the kinematics of high-energy scattering. We show that it is equivalent to Lipatov's effective action approach, and show its computational potential through numerical calculations for scattering processes with several particles in the final state.