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Single Photon Production at Hadron Colliders at NNLO QCD with Realistic Photon Isolation

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arxiv 2205.01516 v2 pith:MHLTTNWC submitted 2022-05-03 hep-ph

X. Chen , T. Gehrmann , E.W.N. Glover , M. Höfer , A. Huss , R. Schürmann This is my paper · ORCID
classification hep-ph
keywords photonisolationcollidershadroncontributionsfragmentationincludingisolated
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Isolated photons at hadron colliders are defined by permitting only a limited amount of hadronic energy inside a fixed-size cone around the candidate photon direction. This isolation criterion admits contributions from collinear photon radiation off QCD partons and from parton-to-photon fragmentation processes. We compute the NNLO QCD corrections to isolated photon and photon-plus-jet production, including these two contributions. Our newly derived results allow us to reproduce the isolation prescription used in the experimental measurements, performing detailed comparisons with data from the LHC experiments. We quantify the impact of different photon isolation prescriptions, including no isolation at all, on photon-plus-jet cross sections and discuss possible measurements of the photon fragmentation functions at hadron colliders.

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Cited by 3 Pith papers

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    Existing LHC data exclude fat-brane mUED compactification scales below about 3 TeV, and ML-tagged searches at 500 fb^-1 could extend the reach to roughly 3.2 to 3.4 TeV.

  3. The next-to-leading order of the differential cross section of the subprocess of annihilation of quark-antiquark pair of prompt photon production in proton-proton collisions at NICA energies

    hep-ph 2026-07 conditional novelty 4.0 of 10

    NLO corrections to q q-bar to g gamma prompt-photon production at NICA energies are about 15 percent of LO and respond more strongly to proton polarization than LO does.

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