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Light Nuclei Production in Au+Au Collisions at $\sqrt{s_{\mathrm{NN}}}$ = 3 GeV from the STAR experiment
by Hui Liu
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Submission summary
| Authors (as registered SciPost users): | Hui Liu |
| Submission information | |
|---|---|
| Preprint Link: | https://arxiv.org/abs/2110.10929v1 (pdf) |
| Date submitted: | 2021-10-22 04:01 |
| Submitted by: | Liu, Hui |
| Submitted to: | SciPost Physics Proceedings |
| Proceedings issue: | 50th International Symposium on Multiparticle Dynamics (ISMD2021) |
| Ontological classification | |
|---|---|
| Academic field: | Physics |
| Specialties: |
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| Approach: | Experimental |
Abstract
Light nuclei production is expected to be sensitive to baryon density fluctuations and can be used to probe the signatures of QCD critical point and/or a first-order phase transition in heavy-ion collisions. In this proceedings, we present the spectra and yields of protons ($p$) and light nuclei ($d$, $t$, $^{3}\mathrm{He}$, $^{4}\mathrm{He}$) in Au+Au collisions at $\sqrt{s_{\mathrm{NN}}}$ = 3 GeV by the STAR experiment. Finally, it is found that the kinetic freeze-out dynamics (temperature $T_{kin}$ $vs.$ average radial flow velocity $\langle\beta_{T}\rangle$) at 3 GeV extracted with the blast-wave model deviate from the trends at high energies ($\sqrt{s_{\mathrm{NN}}}$ = 7.7 - 200 GeV), indicating a different medium equation of state.
Current status:
Reports on this Submission
Report #1 by Anonymous (Referee 1) on 2022-2-8 (Invited Report)
- Cite as: Anonymous, Report on arXiv:2110.10929v1, delivered 2022-02-08, doi: 10.21468/SciPost.Report.4353
Strengths
This paper nicely describes the measurements of particles in Au-Au collisions at RHIC.
The measurements are presented and interpreted with state of the art models, possibly indicating a collision energy dependence.
Weaknesses
Surely due to the limited length of the paper the analysis part could profit from some small extension, discussing e.g. the contribution of the feed-down production to the final measurement.
Report
This article is worth of being published in this Journal
Requested changes
I could submit the following suggestions:
- "restricted volume of phase space" it is unclear what the author is referring to, either specify more either drop the sentence
- If possible in the data analysis section I would add a sentence discussing the contribution to measured yields of the particles produced in the material
Author: Hui Liu on 2022-03-13 [id 2286]
(in reply to Report 1 on 2022-02-08)Thank you for your comments.
Q1:the contribution of the feed-down production to the final measurement.
A1. Actually, for the number of secondary proton come from the strange baryons weak decay, it comes mainly from Lambda weak decay. At this energy, the ratio of Lambda/proton~2.5% (please find the proton and Lambda spectra on attachment), thus to consider the weak decay feed-down contribution from strange baryons to the proton is below 2%, in this proceeding, we have not applied the feed-down correction to the proton measurement.
Q2:"restricted volume of phase space" it is unclear what the author is referring to, either specify more either drop the sentence
A2: Done. Thank you!
Q3: If possible in the data analysis section I would add a sentence discussing the contribution to measured yields of the particles produced in the material
A3. At this energy, without sufficient antiparticles, so we also not removed the particles from material knock-out. Those corrections will be study in the future work.
Attachment:
Lambda_pro_0010_midY.pdf