One-Loop Helicity Amplitudes for ttbar Production at Hadron Colliders

TL;DR

This paper derives compact analytic formulas for one-loop helicity amplitudes in top-antitop quark production at hadron colliders, enhancing computational efficiency and flexibility.

Contribution

It introduces a novel combination of unitarity methods and Feynman techniques to produce fast, flexible amplitude calculations for ttbar production.

Findings

Provides explicit analytic expressions for one-loop helicity amplitudes.

Develops a computationally efficient implementation for collider physics.

Bridges unitarity and Feynman approaches for amplitude calculations.

Abstract

We present compact analytic expressions for all one-loop helicity amplitudes contributing to ttbar production at hadron colliders. Using recently developed generalised unitarity methods and a traditional Feynman based approach we produce a fast and flexible implementation.