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Drell-Yan $p_{\bot}$ with NLO-matched Parton Branching TMDs at energies from fixed-target to LHC
by Aleksandra Lelek
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Submission summary
| Authors (as registered SciPost users): | Aleksandra Lelek |
| Submission information | |
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| Preprint Link: | https://arxiv.org/abs/2108.04613v1 (pdf) |
| Date submitted: | 2021-08-11 14:00 |
| Submitted by: | Lelek, Aleksandra |
| Submitted to: | SciPost Physics Proceedings |
| Proceedings issue: | 28th Annual Workshop on Deep-Inelastic Scattering (DIS) and Related Subjects (DIS2021) |
| Ontological classification | |
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| Academic field: | Physics |
| Specialties: |
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| Approach: | Phenomenological |
Abstract
The description of the Drell-Yan (DY) transverse momentum spectrum requires matching of fixed order QCD calculations with soft gluon resummation up to all orders in the QCD coupling. It has been noticed in the literature that a consistent description of DY data in a wide kinematic regime from fixed-target to LHC energies is problematic. In this talk the predictions for transverse momentum spectrum of DY data coming from experiments in very different kinematic ranges (NuSea, R209, Phenix, LHC 8 TeV and 13 TeV center-of-mass energies $\sqrt{s}$) are calculated by applying transverse momentum dependent (TMD) parton distributions obtained from the Parton Branching (PB) method, combined with the next-to-leading-order (NLO) calculation of the hard process in the MCatNLO method. We discuss the problems involved in matching of the fixed order calculation and resummation, especially in the moderate to low mass and $p_{\bot}$ region accessible at fixed target experiments. We find that at low DY mass and low $\sqrt{s}$ even in the region of $p_{\bot}/m_{DY}\sim 1$ the contribution of multiple soft gluon emissions (included in the PB-TMDs) is essential to describe the measurements, while at larger masses and LHC energies the contribution from soft gluons in the region of $p_{\bot}/m_{DY}\sim 1$ is small.
Current status:
Reports on this Submission
Report #1 by Anonymous (Referee 1) on 2022-2-28 (Invited Report)
- Cite as: Anonymous, Report on arXiv:2108.04613v1, delivered 2022-02-28, doi: 10.21468/SciPost.Report.4560
Report
The paper, Lelek, "Drell-Yan p⊥ with NLO-matched Parton Branching TMDs at energies from fixed-target to LHC" the predictions for transverse momentum spectrum of Drell-Yan data across a wide range of kinematics are calculated using TMD parton distributions from the Parton Branching method combined with the hard process in the MCatNLO method. The different methods of performing calculations are very well described in the manuscript, and the theoretical tools used are well cited and justified in the text.
The manuscript satisfies the requirements to be published in this journal, once a comment is addressed.
I find Fig. 1 to be extremely difficult to read, even at very large magnification. It is almost impossible to see the blue MCatNLO errors on top of the red errors. Further, when I increase the magnification the figure becomes quite blurry. It would help other readers to improve the quality of this figure so it can more easily be seen.