STAR Flow, Chirality and Vorticity PWG

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

Dear Chunjian,

Thank you for considering my suggestion. Actually, our hydrodynamics 
give the same conclusion that the two system have the same nonlinear 
coefficients within error, while the approximation can bias this 
conclusion. It is good to hear that the data show the same trend.
It is interesting that the magnitude of this bias can be quantitively 
described by our hydrodynamic simulaitons, this may indicate the 
non-flow contributions are largely canceled in the ratios.  Attached 
please find plot from our recent work that we plan to submit to arXiv in 
the next few days.

with best regards,
Haojie



On 2022-03-30 07:50, Chunjian Zhang wrote:
> 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
> > ---
> > If you have any problems with the review process, please contact
> > webmaster AT www.star.bnl.gov
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