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Implications of exclusive $J/ψ$ photoproduction in a tamed collinear factorisation approach to NLO
by Chris A. Flett, Alan D. Martin, Misha G. Ryskin, Thomas Teubner
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Submission summary
| Authors (as registered SciPost users): | Chris Flett |
| Submission information | |
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| Preprint Link: | https://arxiv.org/abs/2209.15277v1 (pdf) |
| Date accepted: | 2023-07-04 |
| Date submitted: | 2022-10-03 16:01 |
| Submitted by: | Flett, Chris |
| Submitted to: | SciPost Physics Proceedings |
| Proceedings issue: | 51st International Symposium on Multiparticle Dynamics (ISMD2022) |
| Ontological classification | |
|---|---|
| Academic field: | Physics |
| Specialties: |
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| Approach: | Phenomenological |
Abstract
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.
Published as SciPost Phys. Proc. 15, 005 (2024)
Reports on this Submission
Report #1 by Anonymous (Referee 1) on 2023-1-6 (Invited Report)
- Cite as: Anonymous, Report on arXiv:2209.15277v1, delivered 2023-01-06, doi: 10.21468/SciPost.Report.6467
Report
The author has written a clear and concise summary of their results which they presented at ISMD 2022. It therefore meets the criteria for publication.
Specifically the author has described results which demonstrate that including small-x resummation improves the stability of predictions for exclusive $J/\psi$ photo production. The implementation of low $Q_0$ subtraction leads to a further improvement in stability. The report motivates the study, setting it in the context of known results and demonstrating the potential improvement of their method.
Requested changes
1. Is a sum over quark flavour missing in the second term of equation (1)?