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Related Experiment Video

Updated: Feb 10, 2026

Expansion and Enrichment of Gamma-Delta γδ T Cells from Apheresed Human Product

Expansion and Enrichment of Gamma-Delta γδ T Cells from Apheresed Human Product

Published on: September 22, 2021

NNLO QCD predictions for W γ γ production at the LHC.

Paolo Garbarino¹, Massimiliano Grazzini¹, Stefan Kallweit¹

¹Physik Institut, Universität Zürich, Winterthurerstrasse 190, 8057 Zurich, Switzerland.

The European Physical Journal. C, Particles and Fields

|February 9, 2026

Summary

Precise theoretical predictions for W boson, two photons production at the Large Hadron Collider are now available at next-to-next-to-leading-order (NNLO) in quantum chromodynamics. These calculations enhance previous predictions by 23%, improving electroweak sector studies.

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Recording Gamma Band Oscillations in Pedunculopontine Nucleus Neurons

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Published on: September 14, 2016

Area of Science:

Particle Physics
High-Energy Physics
Quantum Chromodynamics

Background:

Triboson production processes are key to probing the Standard Model's electroweak sector.
Quartic gauge-boson couplings are involved at tree level in these processes.
Precision measurements at the Large Hadron Collider (LHC) necessitate accurate theoretical predictions.

Purpose of the Study:

To compute the next-to-next-to-leading-order (NNLO) quantum chromodynamics (QCD) radiative corrections.
To provide theoretical predictions for W boson and two photons production (Wγγ) at the LHC.
To enhance the precision of electroweak sector measurements.

Main Methods:

Calculation of NNLO QCD radiative corrections to Wγγ production.
Exact calculation, with the finite part of the two-loop contribution in the leading-colour approximation.
Predictions provided for fiducial cross section and kinematic distributions at 13 TeV under standard experimental cuts.

Main Results:

Sizable NNLO corrections found, enhancing next-to-leading-order predictions by approximately 23%.
Residual perturbative uncertainties estimated at the 5% level.
Results align with observations for other multiboson processes involving direct photons.

Conclusions:

The computed NNLO corrections are crucial for precision studies of the electroweak sector at the LHC.
The enhanced predictions improve our understanding of fundamental particle interactions.
The study provides a vital theoretical benchmark for ongoing and future experimental analyses.