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Next-to-Next-to-Next-to-Leading-Order QCD Corrections to Photon-Pair Production

Michał Czakon1,*, Felix Eschment1,†, Terry Generet2,‡, and Rene Poncelet3,§

  • *Contact author: czakon@physik.rwth-aachen.de
  • †Contact author: felix.eschment@rwth-aachen.de
  • ‡Contact author: generet@hep.phy.cam.ac.uk
  • §Contact author: rene.poncelet@ifj.edu.pl
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Phys. Rev. Lett. 137, 171901 – Published 21 October, 2026

DOI: https://doi.org/10.1103/wlcl-c61b

Abstract

The production of two isolated photons at the Large Hadron Collider has applications in Higgs-boson phenomenology and in new-physics searches. In fact, measurements would provide more insight if a percent-level theoretical prediction were available. We account for next-to-next-to-next-to-leading-order strong-interaction effects in the cross section for the first time. This is not only necessary to demonstrate the convergence of perturbation theory, but also results in a reduction of the theoretical uncertainty by a factor of 3 down to 3%. With this, we pave the way to improved analyses.

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Outline

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Phys. Rev. Lett. 137, 171901– Published 21 October, 2026
  • Received 15 April 2026
  • Revised 30 July 2026
  • Accepted 16 September 2026
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