Abstract
We describe the calculation of the next-to-next-to-leading order (NNLO) QCD corrections to isolated photon and photon-plus-jet production, and discuss how the experimental hadron-level photon definition and isolation criteria can be approximated in the theoretical parton-level calculation. The NNLO corrections lead to a considerable reduction of the theory uncertainty on the predictions, typically to less than five per cent, and enable an improved description of experimental measurements from ATLAS and CMS.
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Chen, X., Gehrmann, T., Glover, N. et al. Isolated photon and photon+jet production at NNLO QCD accuracy. J. High Energ. Phys. 2020, 166 (2020). https://doi.org/10.1007/JHEP04(2020)166
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DOI: https://doi.org/10.1007/JHEP04(2020)166