STAR Flow, Chirality and Vorticity PWG

[subhash <subhash AT rcf.rhic.bnl.gov>]

Dear Xiaoyu, PAs,

Thanks for sending the documents. In general it is in a very good shape. 
I have a few comments/suggestions for you to consider.

General comment on manuscript:
You could add line numbers, so it is easy to comment on texts.

1. In the abstract, you have motivated that these results can provide 
insight into baryon stopping. But in the main text and summary, you 
didn't discuss its implications or how our data can be useful. It would 
be good have an elaborate discussion somewhere in the draft.

2.  It is pointed out in [1501.04468, Eur.Phys.J. C75 (2015) no.9, 406] 
that v1 in forward rapidity could be sensitive to shear viscosity to 
entropy and tilt-angle. I would suggest to include as another 
motivation.

3. You have used TPC EP as a reference in your v1 calculation. Is it 
possible to use EPD east as EP and then calculate v1 in EPD west, and 
vice versa?

Comments on manuscript text:
Section-B:
"RHIC run18 in 2018." --> RHIC runs during 2018
"Centrality classes in this data ...." -> You could mention comparison 
with Glauber MC and add a reference
Section III-A
"the “three sub-event method”:" --> add a reference
"TPC event plane resolution ends up between 0.02 and 0.08" --> Do you 
have a resolution plot? Would be good to include in the draft. Is this 
resolution number in absolute or percentage? Are their any uncertainty 
on resolution, e.g. varying eta-gaps?

Section III-B
ADC,MPV are jargons, you may explain ADC, MPV etc here for general 
audience.
"points along η simply by taking the average of the 16 v1 values and 16 
η values"  --> Is the spread considered as syst errors?

Section III-C:
"with the material in the detector" -->  I guess material and support 
structures
"GEANT4[6][7], limiting fragmentation[10][11]" --> Please correct the 
style of referencing

Section III-D:
Discussions on systematic uncertainties could be improved. You could 
either add a table or list the sources of systematic errors and their 
typical magnitude etc.

Cosmetic suggestion:
Could you improve the quality of figures, I mean you could enlarge them 
and make the legends etc larger. For some figures, there are lines 
around it (e.g. Fig. 7, 10), please fix it.

Comments on Analysis Note:
"Correction for the STAR material budget" --> If you are using an 
official star embedding, please include production name details etc. 
here in the AN.
Systematic errors: You could either add a table or list the sources of 
systematic errors and their typical magnitude etc.

Comments on Code:
Could you also make a copy at RCF and send us the path. Eventually, it 
need to be in CVS.

Thanks and regards,
Subhash

On 2023-01-31 02:51 AM, Liu, Xiaoyu via Star-fcv-l wrote:
> Hello all,
>
>  Our paper has been under the PWG review for two weeks and we didn't
> receive any further comments or suggestions. Therefore, we would like
> to move forward and request a GPC for this paper.
>
>  Thanks,
> Xiaoyu
>
> -------------------------
>
> From: Star-fcv-l <star-fcv-l-bounces AT lists.bnl.gov> on behalf of Liu,
> Xiaoyu via Star-fcv-l <star-fcv-l AT lists.bnl.gov>
> Sent: Monday, January 16, 2023 10:12 PM
> To: Star-fcv-l AT lists.bnl.gov <star-fcv-l AT lists.bnl.gov>
> Cc: Prithwish Tribedy <ptribedy AT icloud.com>; Lisa, Michael
> <lisa AT physics.osu.edu>
> Subject: [Star-fcv-l] PWG review for: Measurement of directed flow at
> forward and backward pseudorapidity in Au+Au collisions at 27 GeV with
> the Event Plane Detector (EPD) at STAR
>
>  Hello all, Our paper is ready for the PWG review, please find all the
> information below: Title: Measurement of directed flow at forward and
> backward pseudorapidity in Au+Au collisions at 27 GeV with the Event
> Plane Detector (EPD) at STAR Target
>
>  Hello all,
>
>  Our paper is ready for the PWG review, please find all the
> information below:
>
>  Title: Measurement of directed flow at forward and backward
> pseudorapidity in Au+Au collisions at 27 GeV with the Event Plane
> Detector (EPD) at STAR
>
> Target Journal: PRC
>
> Paper draft:
> https://drupal.star.bnl.gov/STAR/system/files/v1_paper_ver1.pdf [1]
>
> Analysis notes:
> https://drupal.star.bnl.gov/STAR/system/files/v1_27_Analysis_Note_ver1.pdf
> [2]
>
> Webpage:
> https://drupal.star.bnl.gov/STAR/blog/lxy1122/v1-measurement-EPD-27-GeV
> [3]
>
> Replies to PWGC comments:
>  To answer the only question raised in the PWGC preview:
> Slide 7
> Q. How good is TPC Psi1 resolution?
> A. Something like ~0.1 but need to check
>
> The resolution plots can be found on page 20 of the analysis note. In
> summary, after all the weighting and shifting, the TPC event plane
> resolution ends up between 0.02 and 0.08, peaking around the
> centrality of 20 ∼ 30%.
>
>  Analysis code: https://github.com/liuxiaoyuyuyu/v1_27GeV_with_EPD [4]
>
>  _ [4]
>  GitHub - liuxiaoyuyuyu/v1_27GeV_with_EPD [4]
>  Contribute to liuxiaoyuyuyu/v1_27GeV_with_EPD development by creating
> an account on GitHub.
>  github.com
>
>  _
>
>  Any comments or suggestions are welcome!
>
>  Thanks,
> Xiaoyu
>
> Links:
> ------
> [1] 
> https://urldefense.com/v3/__https://drupal.star.bnl.gov/STAR/system/files/v1_paper_ver1.pdf__;!!KGKeukY!2wx5ntCu8yu_yoIg_AbU1NmiotBcfSjzWVvAafBdBpiWgXgG-TQEyBBisXEq5uYTj4MZwYN_I4BgQ8JchcTmXx_Hcz4q4ReoQsQlo6M$
> [2] 
> https://urldefense.com/v3/__https://drupal.star.bnl.gov/STAR/system/files/v1_27_Analysis_Note_ver1.pdf__;!!KGKeukY!2wx5ntCu8yu_yoIg_AbU1NmiotBcfSjzWVvAafBdBpiWgXgG-TQEyBBisXEq5uYTj4MZwYN_I4BgQ8JchcTmXx_Hcz4q4ReoQNPs3Oc$
> [3] 
> https://urldefense.com/v3/__https://drupal.star.bnl.gov/STAR/blog/lxy1122/v1-measurement-EPD-27-GeV__;!!KGKeukY!2wx5ntCu8yu_yoIg_AbU1NmiotBcfSjzWVvAafBdBpiWgXgG-TQEyBBisXEq5uYTj4MZwYN_I4BgQ8JchcTmXx_Hcz4q4ReoLX7wR2s$
> [4] 
> https://urldefense.com/v3/__https://github.com/liuxiaoyuyuyu/v1_27GeV_with_EPD__;!!KGKeukY!2wx5ntCu8yu_yoIg_AbU1NmiotBcfSjzWVvAafBdBpiWgXgG-TQEyBBisXEq5uYTj4MZwYN_I4BgQ8JchcTmXx_Hcz4q4Reo9cc1-W0$
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