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arXiv · 2208.02669

NNLO Photon Production with Realistic Photon Isolation

X. Chen·T. Gehrmann·E. W. N. Glover·M. Höfer·A. Huss·R. Schürmann
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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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X. Chen, T. Gehrmann, E. W. N. Glover, M. Höfer, A. Huss, R. Schürmann. 2022-08-04. NNLO Photon Production with Realistic Photon Isolation. https://arxiv.org/abs/2208.02669

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