Isolated photon and photon+jet production at NNLO QCD accuracy and the ratio $R_{13/8}^{\gamma }$

X. Chen, T. Gehrmann, N. Glover +2

We discuss different approaches to photon isolation in fixed-order calculations and present a new next-to-next-to-leading order (NNLO) QCD calculation of $R_{13/8}^{\gamma }$, the ratio of…