Implications of exclusive $J/\psi$ photoproduction in a tamed collinear factorisation approach to NLO

We discuss exclusive $J/\psi$ photoproduction, initially in conventional collinear factorisation at NLO and then subsequently in a refined approach with a programme of low $x$ resummation and implementation of a crucial low $Q_0$ subtraction included. We compare and contrast predictions in both fram...

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Hauptverfasser: Flett, Chris A, Martin, Alan D, Ryskin, Misha G, Teubner, Thomas
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Sprache:eng
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Zusammenfassung:We discuss exclusive $J/\psi$ photoproduction, initially in conventional collinear factorisation at NLO and then subsequently in a refined approach with a programme of low $x$ resummation and implementation of a crucial low $Q_0$ subtraction included. We compare and contrast predictions in both frameworks and remark about the possibility to constrain and ultimately determine the low $x$ and low scale gluon PDF, emphasising the significance of this for future global PDF analyses.
DOI:10.48550/arxiv.2209.15277