Work

Precise QCD Predictions for Photon-Associated Hadron Production at the LHC

Year: 2026

Type: preprint

Abstract: Prompt-photon production with recoiling QCD radiation is crucial for new-physics searches, determinations of parton distribution and fragmentation functions, and jet-quenching studies in heavy-ion collisions. We present the first fully differential NNLO QCD predictions for photon-associated identified-hadron production at the LHC. We compare predictions obtained with different fragmentation function (FF) sets to ALICE and ATLAS data at $\sqrt{s}=5.02\,{\rm TeV}$. Our calculation provides an important theoretical ingredient for FF global fits and offers a precision proton--proton baseline for photon-tagged heavy-ion studies.

Source: arXiv (Cornell University)

DOI: 10.48550/arxiv.2610.02327

Authors: Fiore, Gabriele, Ridder, Aude Gehrmann-De, Huss, Alexander, Merlotti, Francesco, Stagnitto, Giovanni

Institutions: ETH Zurich, Institute for Theoretical Physics, University of Zurich, European Organization for Nuclear Research, Istituto Nazionale di Fisica Nucleare, Sezione di Genova, University of Genoa

Language: English

Topic: Particle physics theoretical and experimental studies

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung, Centro Svizzero di Calcolo Scientifico, HORIZON EUROPE Framework Programme

Awards: G2363496782, G3416851649, G993971353

OpenAlex ID: W7220429602

Cites: 64

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Related to: 10