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Intermittency analysis of charged hadrons generated in Pb-Pb collisions at √sNN= 2.76 TeV and 5.02 TeV using PYTHIA8/Angantyr
by Salman Khurshid Malik, Ramni Gupta
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Submission summary
| Authors (as registered SciPost users): | Salman Malik |
| Submission information | |
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| Preprint Link: | https://arxiv.org/abs/2210.07942v1 (pdf) |
| Date submitted: | Oct. 17, 2022, 5:17 a.m. |
| Submitted by: | Malik, Salman |
| Submitted to: | SciPost Physics Proceedings |
| Proceedings issue: | 51st International Symposium on Multiparticle Dynamics (ISMD2022) |
| Ontological classification | |
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| Academic field: | Physics |
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Abstract
Local density fluctuations are expected to scale as a universal power-law when the system approaches critical point. Such power-law fluctuations are studied within the framework of intermittency through the measurement of normalized factorial moments in (η, ϕ) phase space. Observations and results from the intermittency analysis performed for charged particles in Pb-Pb collisions using PYTHIA8/Angantyr at 2.76 TeV and 5.02 TeV are reported. We observe no scaling behaviour in the particle generation for any of the centrality studied in narrow pT bins. The scaling exponent ν shows no dependence on the centrality ranges.
Current status:
Reports on this Submission
Report #1 by Anonymous (Referee 1) on 2022-11-16 (Invited Report)
- Cite as: Anonymous, Report on arXiv:2210.07942v1, delivered 2022-11-16, doi: 10.21468/SciPost.Report.6138
Strengths
1) The paper is easy to read. It manages to describe the essential features of the work using only 4 compact formulas without overwhelming the reader with a lot of details.
Report
The authors study local density fluctuations in Pythia/Angantyr model by using normalized factorial moments. The authors do not see signs of scale invariant fluctuations. The authors also extract scaling exponent, which has been predicted for a second order phase transition using Ginzburg-Landau theory. The extracted exponent does not agree with the value predicted for the phase transition. This is an expected result, since Pythia/Angantyr does not assume formation of thermalized plasma. Thus there is no a priori reason to expect to see signs of phase transition in Pythia/Angantyr. The significance of the result is that a model without a phase transition can not reproduce the scaling exponent which is expected of a phase transition. Thus increasing confidence in this observable. I recommend publication.
Requested changes
While reading, I have noticed a few typos etc. that the authors may want to fix for the final version:.
Typos:
-"It’s value is predicted to be"-> Its value is predicted to be
-generaton -> generation
-crtitical -> critical
-"different centrality bins and >> 1.304" I think you should use the latex command \gg here instead of ">>".
Figures:
-Fig. 3 the legend for (ALICE Pb-Pb...) seems to extend beyond the boundaries of the figure.
Author: Salman Malik on 2022-11-29 [id 3086]
(in reply to Report 1 on 2022-11-16)Thank you so much for the comments. I have resubmitted with the mentioned changes.