Predictions for the isolated diphoton production through NNLO in QCD and comparison to the 8 TeV ATLAS data

TL;DR

This paper provides NNLO QCD predictions for isolated diphoton production, compares them to 8 TeV ATLAS data, and discusses uncertainties from isolation procedures and scale variations.

Contribution

It introduces precise NNLO QCD calculations for diphoton production and analyzes the impact of isolation setup uncertainties on theoretical predictions.

Findings

Isolation procedure uncertainties are comparable to scale variation uncertainties.

NNLO predictions align with ATLAS 8 TeV data within uncertainties.

Final results incorporate isolation setup effects.

Abstract

We present cross section predictions for the isolated diphoton production in next-to-next-to-leading order (NNLO) QCD using the computational framework MATRIX. Both the integrated and the differential fiducial cross sections are calculated. We found that the arbitrary setup of the isolation procedure introduces uncertainties with a size comparable to the estimation of the theoretical uncertainties obtained with the customary variation of the factorization and renormalization scales. This fact is taken into account in the final result.