STAR Flow, Chirality and Vorticity PWG

[xibaoshan AT fudan.edu.cn]

Dear Subhash,

Thank you for your comment. Sorry for the late reply. A lot has happened in 
the past few days, and perhaps this response is already a bit outdated. 
However, Better late than never.

This reply also includes the content of Gavin, thank Gavin for his continuous 
work.

Our response is as follows:

General:
For phi spin alignment 19.6 GeV, we already have a preliminary wrt 2nd EP. 
Please make sure we stick to that.
Figures: For several figures Y-axis label touches the numbers, please fix it.

All plots or integrated values of pT dependent rho00 for 19.6 GeV second 
order EP are using the existing preliminary results.


s#5: "Supported by a theoretical model ..." --> May be, Consistent with a 
theoretical model ....

Modified

s#10: Right plot, there is constant shift between results from 1st and 2nd 
order EP. How do we understand this?

There isn’t a physical reasoning behind this as far as we are aware. These 
2nd order results are the SQM2022 preliminary results which have since been 
updated for 19.6 GeV 2nd Order EP, but cannot be shown at QM2023. The updated 
results show more consistency with smaller systematic errors.

s#12: In the FCV presentation, we saw there is an asymmetry in the points wrt 
y. How do you treat that?
Have you checked rho_00 vs y results wrt a random plane?

At present for QM2023, we take the statistical weighted average of the points 
folded around y = 0 and treat the difference between the two points as a 
source of systematic error

We have not performed this check yet for rapidity dependence. Gavin is 
currently working on this.

s#13: Please check the legend labelling. Left figure I think the superscript 
"1" should be for gray markers.
Are the pT window same for both gray and red?

Yes, the pT windows are the same, we have made it clear in the plot that this 
is the case.

Please re-arrange the texts below the figure. References and equations and 
texts are kind of overlapping.

Modified

s#16, 17: Looks too technical, although they are important for this analysis.

Modified

s#16: The fonts of equations look different.

Modified

s#18:  Please add collision system, energy, pt-range etc details for these 
figures.

Modified

s#18,20: Have you compared rho_00 vs Npart between Au+Au, Ru+Ru and Zr+Zr?

We have not yet done this work and will consider it in the next.

s#20: The centrality dependence between Ru+Ru and Zr+Zr looks different. The 
Ru+Ru peripheral points seems systematically below the central/midcentral 
points.

Due to the noisy data of the lowest pt bin and the poor fitting, there may be 
some uncertainty. In the higher pt interval, it can be seen that the 
dependence of ρ_00 on centrality is the same in the three systems.

s#21: It might be good to report the factor of error reduction compared to 
BES-I, instead of saying significant. You already have numbers in slides.
"with data of 2011 and isobar" --> Au+Au and isobars (Ru+Ru and Zr+Zr).
We should state here that \rho^0 and \phi rho_00 shows opposite deviation, 
which a new finding from this analysis.

Modified

s#49: Your rho_00 efficiency doesn't seem smooth for 1.2-1.8 GeV, is it 
efficiency or acceptance folded in?

It is efficiency only. If we consider this eff as yield for fitting, the 
result is 0.329 +- 0.005, which is consistent with 1/3. Our next step will be 
to consider adding statistics to reduce errors.

s#55: Your systematic due to integration underestimated. IN s#56, you can see 
1.0 Gamms vs 1.5 Gamma, you catch the contamination peak at invariant mass of 
0.5, but still you get consistent rho_00. Please check this again.
BTW, what is the source of that bump at lower invariant mass?

Theρ_00obtained from different counting ranges is consistent, as the 
influence of contamination on 7 different cosθ* bins is similar. Therefore, 
it makes the results insensitive to the selection of counting intervals.

This bump is due to poor fitting of k_s^0. And we can effectively exclude 
this part of the statistics within the default counting range. At the same 
time, it can also be seen that the obtained ρ_00 is very insensitive to the 
counting range.

Best,
Baoshan

> -----原始邮件-----
> 发件人: subhash <subhash AT rcf.rhic.bnl.gov>
> 发送时间:2023-08-29 10:13:23 (星期二)
> 收件人: xibaoshan AT fudan.edu.cn
> 抄送: "STAR Flow, Chirality and Vorticity PWG" <star-fcv-l AT lists.bnl.gov>
> 主题: Re: [Star-fcv-l] STAR presentation by Baoshan Xi for Quark Matter 2023 
> submitted for review
> 
> Dear Baoshan, PAs,
> 
> Thanks for the updated slides. They look nice. I have a few questions 
> and comments below:
> 
> General:
> For phi spin alignment 19.6 GeV, we already have a preliminary wrt 2nd 
> EP. Please make sure we stick to that.
> Figures: For several figures Y-axis label touches the numbers,please fix 
> it.
> 
> 
> s#5: "Supported by a theoretical model ..." --> May be, Consistent with 
> a theoretical model ....
> 
> s#10: Right plot, there is constant shift between results from 1st and 
> 2nd order EP. How do we understand this?
> 
> s#12: In the FCV presentation, we saw there is an asymmetry in the 
> points wrt y. How do you treat that?
> Have you checked rho_00 vs y results wrt a random plane?
> 
> s#13: Please check the legend labelling. Left figure I think the 
> superscript "1" should be for gray markers.
> Are the pT window same for both gray and red?
> 
> Please re-arrange the texts below the figure. References and equations 
> and texts are kind of overlapping.
> 
> s#16, 17: Looks too technical, although they are important for this 
> analysis.
> 
> s#16: The fonts of equations look different.
> 
> s#18:  Please add collision system, energy, pt-range etc details for 
> these figures.
> 
> s#18,20: Have you compared rho_00 vs Npart between Au+Au, Ru+Ru and 
> Zr+Zr?
> 
> s#20: The centrality dependence between Ru+Ru and Zr+Zr looks different. 
> The Ru+Ru peripheral points seems systematically below the 
> central/midcentral points.
> 
> s#21: It might be good to report the factor of error reduction compared 
> to BES-I, instead of saying significant. You already have numbers in 
> slides.
> 
> "with data of 2011 and isobar" --> Au+Au and isobars (Ru+Ru and Zr+Zr).
> 
> We should state here that \rho^0 and \phi rho_00 shows opposite 
> deviation, which a new finding from this analysis.
> 
> 
> I was also checking your back up slides. I think you will not keep all 
> of them for talks. But I have a few questions regarding those:
> s#49: Your rho_00 efficiency doesn't seem smooth for 1.2-1.8 GeV, is it 
> efficiency or acceptance folded in?
> 
> s#55: Your systematic due to integration underestimated. IN s#56, you 
> can see 1.0 Gamms vs 1.5 Gamma, you catch the contamination peak at 
> invariant mass of 0.5, but still you get consistent rho_00. Please check 
> this again.
> BTW, what is the source of that bump at lower invariant mass?
> 
> 
> Thanks and regards,
> Subhash
> 
> On 2023-08-28 05:04 PM, xibaoshan AT fudan.edu.cn wrote:
> > Dear Subhash and all,
> > 
> > Sorry for the mistake.
> > I have updated the files for both websites.
> > 
> > Best,
> > Baoshan
> > 
> > 
> >> -----原始邮件-----
> >> 发件人: subhash <subhash AT rcf.rhic.bnl.gov>
> >> 发送时间:2023-08-28 16:05:36 (星期一)
> >> 收件人: "STAR Flow, Chirality and Vorticity PWG" 
> >> <star-fcv-l AT lists.bnl.gov>
> >> 抄送: xibaoshan AT fudan.edu.cn
> >> 主题: Re: [Star-fcv-l] STAR presentation by Baoshan Xi for Quark Matter 
> >> 2023 submitted for review
> >> 
> >> Dear Baoshan,
> >> 
> >> Could you please upload your latest/correct talk at this link?
> >> https://drupal.star.bnl.gov/STAR/node/64789
> >> Currently, it has 58 slides, I don't think it is the intended slide
> >> version.
> >> 
> >> 
> >> The following link correspond to QM abstract that was submitted.
> >> https://drupal.star.bnl.gov/STAR/presentations/Quark-Matter-2023/New-Insights-Global-Spin-Alignment-Heavy-Ion-Collisions-Measurements
> >> It should contain QM abstract that is submitted.
> >> 
> >> Thanks and regards,,
> >> Subhash
> >> 
> >> 
> >> On 2023-08-23 09:23 PM, Baoshan Xi via Star-fcv-l wrote:
> >> > Dear conveners and all,
> >> >
> >> > I have made some updates to the slides.
> >> >
> >> > Please kindly find the updated report by the link:
> >> >
> >> > https://drupal.star.bnl.gov/STAR/presentations/Quark-Matter-2023/New-Insights-Global-Spin-Alignment-Heavy-Ion-Collisions-Measurements
> >> >
> >> > Best,
> >> > Baoshan
> >> >
> >> >
> >> >
> >> >
> >> >> -----原始邮件-----
> >> >> 发件人: "webmaster--- via Star-fcv-l" <star-fcv-l AT lists.bnl.gov>
> >> >> 发送时间:2023-08-21 20:55:52 (星期一)
> >> >> 收件人: star-fcv-l AT lists.bnl.gov
> >> >> 抄送: webmaster AT star.bnl.gov
> >> >> 主题: [Star-fcv-l] STAR presentation by Baoshan Xi for Quark Matter 2023
> >> >> submitted for review
> >> >>
> >> >> Dear star-fcv-l AT lists.bnl.gov members,
> >> >>
> >> >> Baoshan Xi (xibaoshan AT fudan.edu.cn) has submitted a material for a
> >> >> review,
> >> >> please have a look:
> >> >> https://drupal.star.bnl.gov/STAR/node/64789
> >> >>
> >> >> Deadline: 2023-09-03
> >> >> ---
> >> >> If you have any problems with the review process, please contact
> >> >> webmaster AT www.star.bnl.gov
> >> >> _______________________________________________
> >> >> Star-fcv-l mailing list
> >> >> Star-fcv-l AT lists.bnl.gov
> >> >> https://lists.bnl.gov/mailman/listinfo/star-fcv-l
> >> > _______________________________________________
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> >> > Star-fcv-l AT lists.bnl.gov
> >> > https://lists.bnl.gov/mailman/listinfo/star-fcv-l