Single photon production at hadron colliders at NNLO QCD with realistic photon isolation

Chen, X.; Gehrmann, T.; Glover, E.W.N.; Höfer, M.; Huss, A.; Schürmann, R.

doi:10.1007/jhep08(2022)094

Single photon production at hadron colliders at NNLO QCD with realistic photon isolation

Chen, X.; Gehrmann, T.; Glover, E.W.N.; Höfer, M.; Huss, A.; Schürmann, R.

Authors

X. Chen

T. Gehrmann

Professor Nigel Glover e.w.n.glover@durham.ac.uk
Professor

M. Höfer

A. Huss

R. Schürmann

Abstract

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.

Citation

Chen, X., Gehrmann, T., Glover, E., Höfer, M., Huss, A., & Schürmann, R. (2022). Single photon production at hadron colliders at NNLO QCD with realistic photon isolation. Journal of High Energy Physics, 2022(8), Article 94. https://doi.org/10.1007/jhep08%282022%29094

Journal Article Type	Article
Acceptance Date	Jul 6, 2022
Online Publication Date	Aug 5, 2022
Publication Date	2022
Deposit Date	Sep 12, 2022
Publicly Available Date	Sep 12, 2022
Journal	Journal of High Energy Physics
Print ISSN	1126-6708
Electronic ISSN	1029-8479
Publisher	Scuola Internazionale Superiore di Studi Avanzati (SISSA)
Peer Reviewed	Peer Reviewed
Volume	2022
Issue	8
Article Number	94
DOI	https://doi.org/10.1007/jhep08%282022%29094

Files

Published Journal Article (1.1 Mb)
PDF

Publisher Licence URL
http://creativecommons.org/licenses/by/4.0/

Copyright Statement
This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.