Isolated photon and photon+jet production at NNLO QCD accuracy
arXiv:1904.01044 · doi:10.1007/JHEP04(2020)166
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.
JHEP version, 30 pages, 17 figures