STAR Flow, Chirality and Vorticity PWG

[Chunjian Zhang <chun-jian.zhang AT stonybrook.edu>]

Dear Haojie,

Hello. Very nice and comprehensive slides to me. 

Thank you for your nice suggestions. Now we use the exact ac2{3}/<v_2^4> ratio between Ru+Ru and Zr+Zr collisions as the equations.

Please find the new plot in https://drupal.star.bnl.gov/STAR/system/files/ac23_STAR_0329.pdf  It will be helpful if you could use this new plot to replace the old version in the slide 12. And also change the third bullet point to “Non-linear coefficents are ideally identical in the final-state””. Thank you. 

The nonflow would be mostly canceled and then will not affect the double ratios in the lower panel especially from midcentral to central collisions.  If it still has residual nonflow, it may only affect peripheral region a little bit. The model study here also helps us to clarify this.  Even so, the futher relevant nonflow understanding is ongoing in our to do list. 

best regards

chunjian 

On Mar 29, 2022, at 1:07 AM, haojiexu <haojiexu AT rcf.rhic.bnl.gov> wrote

Hi Chunjian, and all

Your nice suggestions are implemented, here is the updated slides

https://drupal.star.bnl.gov/STAR/system/files/QM2022_HaojieXu_v10.pdf

I am still worried about the message from lower panel of ac3 plot. Besides the non-flow effect, as I have already mentioned, the ac2{3}/v_2{2}^{4} is not exactly the non-linear coefficient.  As it was just an approximation, I suggest not to extract any nonlinear coefficient at this moment. Or can you directly compare ac2{3} to <v_2^{4}> instead of v_2{2}^{4}?

with best regards,
Haojie


On 2022-03-29 04:56, Chunjian Zhang wrote:

Dear Haojie,
Hello. Very nice and comprehensive slides. Please find some comments below:
1) S3:
—>  v2-> v_{2}
—> I guess you would like to use the new Ntrk ratio plot from the nice
isobar publication.
2) S9: It would be helpful if you could add one more reference: J.Jia
and C. Zhang, arXiv:2111.15559
4) S12:
  —> above formula, n=2, just label ac_2{3}….
  —> I would be helpful you could add a punchline as other slides at
below: “Experimental test on non-linear coupling coefficient”.
    Thank you for your suggestions for the plots. The double ratio is
the money plot calculated from above panels. Then the audiences would
see how is the difference directly. Also, ampt calculation could
reproduce the data. The detailed nonflow studies for understanding any
flow observables are extramly complicated and there are no any
conclusive answers yet. let’s not worry about it.
best regards
Chunjian

On Mar 28, 2022, at 11:22 AM, haojiexu via Star-fcv-l <star-fcv-l AT lists.bnl.gov> wrote:
Dear chunjian, and all
The slides have been updated with suggestions from the last FCV meeting and Collaboration meeting. I also made a few minor changes. Your comments are welcome. Here is the link to my slides
https://drupal.star.bnl.gov/STAR/system/files/QM2022_HaojieXu_v9.pdf
I have a suggestion on ac2{3} plot in slide 12. I suggest do not show the lower panel and the value of the non-linear coefficient ratio, because the ac2{3}/v_2{2}^{4} is not exactly the non-linear coefficient, and ac2{3} is also sensitive to non-flow effect.
with best regards,
Haojie
On 2022-03-08 23:55, webmaster--- via Star-fcv-l wrote:

Dear star-fcv-l AT lists.bnl.gov members,
Haojie Xu (haojiexu AT zjhu.edu.cn) has submitted a material for a review,
please have a look:
https://drupal.star.bnl.gov/STAR/node/58778
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