Abstract
We present the NLO QCD corrections to pp → γγj production at hadron colliders. Our calculation includes contributions from the fragmentation of a hadronic jet into a highly energetic photon, and consequently allows the implementation of arbitrary infrared-safe photon isolation definitions. We compare different photon isolation criteria and perform a detailed study of the dependence of the γγj cross section on the photon isolation parameters.
Highlights
We present the NLO QCD corrections to pp → γγj production at hadron colliders
Comparing figure 3 and figure 4, it can be seen that the qualitative dependence on the hadronic energy threshold parameters c and is substantially different
We observe that the cross section remains almost constant over a large range of c, while for Frixione isolation, the cross section increases mildly over the interval 0.1 < < 1. This difference in the qualitative behaviour shows that the parameters can not be translated into each other, since the threshold in the fixed cone isolation is rigid, while the threshold in the Frixione isolation is dynamical, and weighted by the distance to the cone axis
Summary
We present the NLO QCD corrections to pp → γγj production at hadron colliders. Our calculation includes contributions from the fragmentation of a hadronic jet into a highly energetic photon, and allows the implementation of arbitrary infrared-safe photon isolation definitions. After communication with the authors of ref. [70] it turned out that the original version of our code did not call the correct photon fragmentation functions.
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