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Intermittency analysis of charged particles generated in Xe-Xe~collisions at $\sqrt{s_{\rm{NN}}}$ = 5.44 TeV using the AMPT model
by Zarina Banoo, Ramni Gupta
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Submission summary
| Authors (as registered SciPost users): | Zarina Banoo |
| Submission information | |
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| Preprint Link: | https://arxiv.org/abs/2210.08058v1 (pdf) |
| Date submitted: | 2022-10-19 11:33 |
| Submitted by: | Banoo, Zarina |
| 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
The multiplicity fluctuations are sensitive to QCD phase transition and to the presence of critical point in QCD phase diagram. At critical point a system undergoing phase transition is characterized by large fluctuations in the observables which is an important tool to understand the dynamics of particle production in heavy-ion interactions and phase changes. Multiplicity fluctuations of produced particles is an important observable to characterize the evolving system. Using scaling exponent obtained from the normalized factorial moments of the number of charged hadrons in the two dimensional ($\eta,\phi$) phase space, one can learn about the dynamics of system created in these collisions. Events generated using Xe-Xe collisions at $\sqrt{s_{\rm{NN}}} = 5.44 $ TeV with string-melting (SM) version of the AMPT model are analyzed and the scaling exponent $(\nu)$ for various $p_T$ intervals is determined. It is observed that the calculated value of $\nu$ is larger than the universal value 1.304, as is obtained from Ginzburg-Landau theory for second order phase transition. Here we will also present the results of the dependence of the scaling exponent on the transverse momentum bin width.
Current status:
Reports on this Submission
Anonymous Report 1 on 2022-11-16 (Invited Report)
- Cite as: Anonymous, Report on arXiv:2210.08058v1, delivered 2022-11-16, doi: 10.21468/SciPost.Report.6136
Strengths
1) The work is described clearly and concisely.
Report
The authors look for signs of phase transitions in Xe-Xe collisions using AMPT model by extracting the scaling exponent from multiplicity fluctuations using normalized factorial moments of the charged hadron multiplicity. The scaling exponent is then compared to its universal value obtained from Ginzburg-Landau theory and ALICE data from Pb-Pb collisions. The authors find a value of the scaling exponent that is inconsistent with the universal value for second order phase transitions. This is natural ,since AMPT model does not have the physics of phase transition built-in. The value of the study is that it ensures that the AMPT model does not accidentally reproduce the universal value, and if experiments observe the universal value of the scaling exponent in Xe-Xe collisions, it is more likely to be a sign of a genuine phase transition, rather than a coincidence (since it cannot be reproduced in models which lack a phase transition). I recommend publication
Requested changes
I have noticed some (very) minor issues that are not related to the scientific content of the paper:
1) Typos: "However the presence of such statistical noise may creates
problem" -> "create"
"Which are due to Statistical effects." I think the word "statistical" is unnecessarily capitalized here
2) References are a bit inconsistent at the moment. Refs. [1]-[5] have journal entries, and refs. [6]-[8] are a bit ambiguous. If refs [6]-[8] refer to these papers:
-[6] https://inspirehep.net/literature/1767622
-[7] https://inspirehep.net/literature/1287071
-[8] https://inspirehep.net/literature/1680035
It would be great if the authors could add the journal information also to these items.
Author: Zarina Banoo on 2022-11-20 [id 3049]
(in reply to Report 1 on 2022-11-16)Thank you very much for the excellent report.
I'll make the modifications and resubmit it.