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NNLO Photon Production with Realistic Photon Isolation


Schuermann, Robin; Chen, Xuan; Gehrmann, Thomas; Glover, Nigel; Höfer, Marius; Huss, Alexander (2022). NNLO Photon Production with Realistic Photon Isolation. In: Loops and Legs in Quantum Field Theory, Ettal, Germany, 25 April 2022 - 30 July 2022.

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.

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.

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Additional indexing

Item Type:Conference or Workshop Item (Paper), not_refereed, original work
Communities & Collections:07 Faculty of Science > Physics Institute
Dewey Decimal Classification:530 Physics
Language:English
Event End Date:30 July 2022
Deposited On:14 Feb 2023 16:37
Last Modified:19 Feb 2023 15:05
OA Status:Hybrid
Publisher DOI:https://doi.org/10.22323/1.416.0034
  • Content: Published Version
  • Language: English