High-precision prediction for multi-scale processes at the LHC

TL;DR

This paper presents advanced NNLO QCD predictions for multi-scale processes at the LHC, enhancing the precision of theoretical models used to test the Standard Model and search for new physics.

Contribution

It provides the first phenomenological NNLO QCD results for three-jet and photon plus two-jet production at the LHC, improving theoretical accuracy.

Findings

NNLO QCD predictions match experimental data more closely.

Enhanced understanding of multi-jet and photon production processes.

Refined parameters for probing QCD and BSM physics.

Abstract

Comparisons of higher-order predictions within the Standard Model of Particle Physics (SM) to data are central to high-energy collider experiments like the Large Hadron Collider (LHC). Processes with multiple kinematic scales, such as multi-jet and prompt photon production, provide a unique possibility for probing Quantum Chromodynamics (QCD). These processes directly test perturbative QCD and can be used to extract fundamental parameters like the strong coupling constant and to search for BSM physics. Recent developments enabled lifting three-jet, photon plus two-jet, photon-pair plus jet, and three-photon cross-sections to QCD's next-to-next-to-leading order (NNLO). This contribution presents phenomenological results at NNLO QCD for three-jet and photon plus two-jet production.