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Measurements of charm production in pp collisions with ALICE
by Tiantian Cheng for the ALICE Collaboration
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Submission summary
| Authors (as registered SciPost users): | Tiantian Cheng |
| Submission information | |
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| Preprint Link: | https://arxiv.org/abs/2111.12054v1 (pdf) |
| Date submitted: | 2021-11-24 03:06 |
| Submitted by: | Cheng, Tiantian |
| Submitted to: | SciPost Physics Proceedings |
| Proceedings issue: | 50th International Symposium on Multiparticle Dynamics (ISMD2021) |
| Ontological classification | |
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| Academic field: | Physics |
| Specialties: |
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| Approach: | Experimental |
Abstract
The production of charm-hadrons at midrapidity in pp collisions at $\sqrt{s}$ = 5.02 and 13 TeV was recently measured by the ALICE Collaboration. The results show that the baryon-to-meson yield ratios are significantly higher than those measured in $\rm e^{+}e^{-}$ collisions for different charm-baryon species. These observations suggest that the charm fragmentation fractions are not universal and that the baryon-to-meson ratio depends on the collision systems. The results are compared to the predictions from Monte Carlo event generators and theoretical calculations.
Current status:
Reports on this Submission
Report #1 by Anonymous (Referee 1) on 2022-1-31 (Invited Report)
- Cite as: Anonymous, Report on arXiv:2111.12054v1, delivered 2022-01-31, doi: 10.21468/SciPost.Report.4294
Strengths
A well-presented report, giving a succinct summary of this interesting area and inviting investigation of the original papers.
Weaknesses
The abstract states that "the baryon-to-meson yield ratios are significantly higher than those measured in e+e− collisions for different charm-baryon species", but this isn't shown in the write-up: all we see of the ratios is the pp data against models (getting worse for heavier baryons unless a coalescence mechanism is included -- interesting/important).
The comparison to e+e- and ep is in terms of the yields, not the ratios, where D0 production decreases and Lambda increases... but this isn't highlighted in the text, and doesn't seem as general a conclusion as given in the abstract. Any clarification that can be added, to give a more coherent picture?
Report
The acceptance criteria are met, but if the author is willing to add some small explanation of the issues raised above, it would improve the clarity.
Requested changes
1. Match abstract/conclusions to the three results shown.
2. Explain the combination of baryon/D0 ratios and frag function changes in a coherent picture, i.e. how general is the statement that baryon/D0 are generally higher than in e+e- and ep machines?