STAR HardProbes PWG

["Mooney, Isaac" <isaac.mooney AT yale.edu>]

Hi Dandan,

The poster is looking very good, and I am happy with your current phrasing of the conclusions section after the earlier discussions about pT and centrality dependence. Please see a few comments from me below. I sign off.

Thanks,

Isaac

*Either "can new" -> "can provide new" or replace it with an arrow

*This motivation seems a bit generic. I think you could add a condensed version of something similar to the "In addition to the quarkonium yield..." and "Another effect that may alter the polarization..." paragraphs in https://cds.cern.ch/record/2805485/files/PublicNote.pdf which I think give a good motivation for polarization modification studies.

*Since you mentioned it in the Intro, I think it would be helpful in the Results section to also point out that lambda_inv is roughly consistent between helicity and Collins-Soper frames (at least it looks like it by eye to me).

On Aug 28, 2023, at 3:23 PM, Ma, Rongrong via Star-hp-l <star-hp-l AT lists.bnl.gov> wrote:

Hello Dandan

Thanks for addressing my comments. I have a few additional ones. 

General

- The symbols used to indicate bullets vary quite a bit across different parts. It would be good to make them consistent. Same for the sub-bullets. 

MOTIVATION AND INTRODUCTION

- can new insight into -> can provide insight into

- there seems an extra empty space between "feed-down" and "structure"

- move "QGP can alter the J/psi polarization" to be above "Modifications to the feed-down structure in the QGP"

- should give -> should yield

ANALYSIS PROCEDURE

- In line 1 and line 7, "and" should not be italicized

- calculate A x\epsilon using -> calculate Ax\epsilon using

- tuning of J/psi generated distribution -> tuning of J/psi polarization

RESULTS AND CONCLUSIONS

- at RHIC energy -> at RHIC

- make "J/psi polarization vs p_T" a regular bullet, instead of a sub-bullet

- and no p_T -> with no obvious

- make "J/psi polarization vs centrality" a regular bullet, instead of a sub-bullet

- global spin alignment -> spin alignment

- Related to your outlook, STAR probably will release the measurement of J/psi spin alignment using first-order event plane with ZDC (https://drupal.star.bnl.gov/STAR/system/files/JPsiPreliminaryRequest.pdf). Do you plan to do a similar measurement or something different? If the latter, please indicate the difference, for example using TPC event plane. 

Best

Rongrong

On Aug 28, 2023, at 12:16 AM, Dandan <shendandan AT mail.sdu.edu.cn> wrote:

Hi Rongrong,

Thank for your nice comments.

Please find new version of  poster in the link: https://drupal.star.bnl.gov/STAR/system/files/Dandan_QM2023_v3_1.pdf

Best,

Dandan

From: "Ma, Rongrong" <marr AT bnl.gov>
Date: 2023-08-26 02:14:44
To:  STAR HardProbes PWG <star-hp-l AT lists.bnl.gov>
Cc:  "shendandan AT mail.sdu.edu.cn" <shendandan AT mail.sdu.edu.cn>
Subject: Re: [Star-hp-l] STAR presentation by Dandan Shen for Quark Matter 2023 submitted for review>Hello Dandan
>
>I was asked by the STAR management to take a look at your poster. Here are some comments for your consideration: 
>
>General
>- Sometimes you put a period at the end of a bullet, and sometimes you do not. Please pick one style and stick with it. 
>- In general, x-axis and y-axis titles and labels for your preliminary figures are too small. Please make them bigger. 
>- The resolution of the preliminary figures seems a bit low. Are you using the pdf version for the figures?
>
>ABSTRACT
>- remove "For example, it has been hypothesized that / can be polarized due to the spin-orbit coupling between / and QGP's large angular momentum in non-central heavy-ion collisions." since this sentence is about the global spin alignment, which you do not show. 
>- remove ", as well as with respect to the event plane," since you do not show any results for this
>- \sqrt{s_NN}= 200 GeV will be presented -> \sqrt{s_NN} = 200 GeV will be presented
>
>MOTIVATION AND INTRODUCTION
>- Studying the / polarization in Heavy-ion collisions can provide additional insight into the J/psi production mechanism in HIC -> Study / polarization in heavy-ion collisions can provide new insight into the interaction between J/psi and the QGP
>- reverse the order of the two sub-bullets of the first bullet
>- QGP affects the polarization of / -> QGP can alter the / polarization
>- Different feed-down components due to the hot medium effect. -> Modifications to the feed-down structure in the QGP
>- can be analyzed -> can be extracted
>- Z-axis -> z-axis (two places)
>- the direction -> direction
>- the bisector -> bisector
>- remove the last bullet, since again you do not present any results for this. You can use this space to introduce _inv, and explain why one wants to measure it.
>
>STAR EXPERIMENT
>- Timing resolution < 100 -> Timing - particle identification
>- electron identification -> Electron identification
>
>ANALYSIS PROCEDURE
>- extraction of raw / yields at different    by fitting the di-electron invariant mass distribution -> extract raw / yields in different  and  bins by fitting dielectron invariant mass distributions
>- calculation of  × using MC simulation and correction of raw yield distribution -> calculate  × using detector simulation and apply it to raw yields
>- simultaneously fit the corrected yield distribution in both   , extraction polarization parameters(, ) -> simultaneously fit the corrected yield distributions as a function of  and  to extract  and 
>- Here, I think you should add a bullet about the iteration procedure
>- Figure 1
>-- Isobar -> Ru+Ru & Zr+Zr
>-- [0,80%] -> 0-80%
>-- The invariant mass distributions of -+ pairs in -> Invariant mass distributions of dielectron pairs within
>- Figure 2
>-- Add "Ru+Ru & Zr+Zr \sqrt{s_NN} = 200 GeV"
>-- [0,80%] -> 0-80%
>-- extracting the polarization parameters(, ) after iteration -> extracting  and  at the last iteration
>
>RESULTS AND CONCLUSION
>- Title: Conclusion -> Conclusions
>- Figures
>-- It is visually overwhelming to use red color for all data points. I suggest to use blue solid circles for Helicity and red open circles for CS 
>-- text in the figure is a bit small. Please increase the size
>-- I do not think you need the legend for "Sys. Unc."
>-- It is weird to use "Helicity" and "Collins-Soper" in the legend since they are not what the data points represent. I suggest to put the frame name in the up-left corner in the top panel, and move information about Jpsi and centrality or pT range together and put it in the lower-right part of the top panel. By the way, you use "Helicity" and "Collins-Soper" in the left figure, but "HX" and "CS" in the right figure. Please use consistent names. 
>-- In the right figure, for the centrality integrated, you can remove "Centrality" and make "0-80%" bigger.
>- Add two sub-bullets to the first bullet: i) Ru+Ru & Zr+Zr collisions at \sqrt{s_NN} = 20 GeV; ii) /: 0.2 < p_T < 10. GeV/c, |y| < 1
>- remove the second bullet, and make its sub-bullets as regular bullets
>- vs Centrality -> vs centrality
>- No significant dependence of ,  moving from central to peripheral events -> No significant dependence of ,  on centrality
>- keep in tune for / global spin alignment measurement -> Outlook: measurement of / global spin alignment
>
>REFERNECES
>- Unify the reference style, such as where to put year and wether you add parenthesis around year
>
>Best
>Rongrong
>
>> On Aug 22, 2023, at 5:59 AM, webmaster--- via Star-hp-l <star-hp-l AT lists.bnl.gov> wrote:
>> 
>> Dear Star-hp-l AT lists.bnl.gov members,
>> 
>> Dandan Shen (shendandan AT mail.sdu.edu.cn) has submitted a material for a  
>> review, please have a look:
>> https://drupal.star.bnl.gov/STAR/node/64806
>> 
>> Deadline: 2023-09-03
>> ---
>> If you have any problems with the review process, please contact  
>> webmaster AT www.star.bnl.gov
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>

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