One-Loop Multi-Parton Amplitudes with a Vector Boson for the LHC

TL;DR

This paper presents the first numerically stable one-loop amplitude calculations for W/Z boson production with three jets at the LHC, using automated on-shell methods implemented in BlackHat.

Contribution

It introduces a stable computational approach for complex multi-parton amplitudes at NLO, scalable to many external particles, enhancing LHC phenomenology tools.

Findings

First stable results for W/Z + 3 jet amplitudes at NLO

Implementation in BlackHat enables automated calculations

Methods applicable to various LHC processes

Abstract

In this talk, we present the first, numerically stable, results for the one-loop amplitudes needed for computing W,Z + 3 jet cross sections at the LHC to next-to-leading order in the QCD coupling. We implemented these processes in BlackHat, an automated program based on on-shell methods. These methods scale very well with increasing numbers of external partons, and are applicable to a wide variety of problems of phenomenological interest at the LHC.