CERN Accelerating science

Article
Report number	arXiv:2208.02669
Title	NNLO Photon Production with Realistic Photon Isolation
Author(s)	Schuermann, Robin (Zurich U.) ; Chen, Xuan (Karlsruhe U., ITP ; KIT, Karlsruhe, IAP) ; Gehrmann, Thomas (Zurich U.) ; Glover, E.W.N. (Durham U., IPPP) ; Höfer, Marius (Munich U., ASC) ; Huss, Alexander (CERN)
Publication	2022-10-20
Imprint	2022-08-04
Number of pages	11
In:	PoS LL2022 (2022) 034
In:	16th DESY Workshop on Elementary Particle Physics: Loops and Legs in Quantum Field Theory 2022, Ettal, Germany, 25 - 30 Apr 2022, pp.034
DOI	10.22323/1.416.0034
Subject category	hep-ph ; Particle Physics - Phenomenology
Abstract	Isolated photon production at hadron colliders proceeds via direct production and fragmentation processes. Theory predictions for the isolated photon and photon-plus-jet cross section often impose idealised photon isolation criteria, eliminating the fragmentation contribution and introducing a systematic uncertainty in the comparison to data. We present NNLO predictions for the photon-plus-jet cross section with the experimental isolation including both, direct and fragmentation contributions. Predictions with two different parton-to-photon fragmentation functions are compared, allowing for an estimation of the uncertainty stemming from the only loosely constrained photon fragmentation functions.
Copyright/License	publication: © 2022-2024 The author(s) (License: CC-BY-NC-ND-4.0) preprint: (License: CC BY 4.0)

Corresponding record in: Inspire