STAR Flow, Chirality and Vorticity PWG

[ShinIchi Esumi <esumi.shinichi.gn AT u.tsukuba.ac.jp>]

Dear Chunjian

Thanks for the nice presentation. Although I’ve already signed off, I have a few more 

questions and suggestions.

Why don’t you start your x-axis (Nch_corr) from zero for page 7 and 8? Any reason 

to exclude a first few points as you are starting from 20 in stead of 0? If not, please 

start from 0. Even if you do need to exclude a first few points from the plots, I would 

still start the x-axis from 0. 

The plot on the page 8 is very good to show the experimental data with emphasized 

"large and clear solid" symbol, however it is not the case in the plots on page 7, where 

the experimental data are not really clearly shown, so could you please make it (STAR 

Data) clear with "larger and solid symbol", while the other model points with "smaller 

and open symbols"? 

If the Ntrk_offline definition shown in your backup is mostly same as your Nth_corr, 

it would still be good to show this "multiplicity ratio" also in the plots in page 7 and 8, 

although we do not yet know how to compare/interpret, maybe just with a thin line 

with excluding the connecting lines between points that you now have in your page 7. 

I would still like to see your Nth_corr distribution overlaid with the published Ntrk_offline 

distribution to confirm these, if they are different, I do agree that it does not make sense 

to overlay the multiplicity ratio on page 7 and 8. 

Best regards, ShinIchi

On Oct 6, 2021, at 23:34, Chunjian Zhang <chun-jian.zhang AT stonybrook.edu> wrote:

Dear Shinlchi,

Hello. Thank you for your nice comments and suggestions. I also include your comments with the updated version in https://drupal.star.bnl.gov/STAR/system/files/DNP_Oct_STAR_SBU_ChunjianZhang_v1.pdf

I also update the new plots. 

On Oct 5, 2021, at 11:51 PM, ShinIchi Esumi via Star-fcv-l <star-fcv-l AT lists.bnl.gov> wrote:

Dear Chunjian
I would also sign off your nice DNP presentation with a few comments.
1) I would also like to see the ratio of RefMult in the page 7 in addition to your page 8.

Finally we may not include the Nch distribution in the outside. This may be accidental. I have no idea how to connect it right now. We need to dig it out with more studies and insights

Please find the plots below 

<PastedGraphic-1.png>

2) I thought you were also requesting preliminaries for v2, v3 and 2nd and 3rd order normalized
   mean pT fluctuation before making their ratios. If so, we could have them in the backup?  

I did not request them separately. I only need the ratio for my talk presently and the ratio is totally robust.  We do not need to worry anything. 

3) I would also have original RefMult distributions somewhere at least in your back-up?

I include the published CME refmult in my backup slide

4) Please prepare a set of preliminary plots in one page so that we can include in the DB.

I will do it as soon as possible. Thank you for your kind reminder.

Best regards, ShinIchi

Best regards 

Chunjian 

On Oct 6, 2021, at 10:46, Prithwish Tribedy via Star-fcv-l <star-fcv-l AT lists.bnl.gov> wrote:

Hi Chunjian,
Nice slides:
https://drupal.star.bnl.gov/STAR/system/files/DNP_Oct_STAR_SBU_ChunjianZhang_v0.pdf

Please see my comments below. With these included, I sign-off.

slide#1:
I think it's always a great idea to spell out your institution name below your name. Also your name doesn't have to be written in too small font like you have now.

slide#2:
The right most cartoon is not "Freeze Out" its more like "Detection"

slide#2:
"pressure gradient forces" --> "pressure gradients"

slide#2:
"The shape of the size of the overlap is directly controlled by the shape..colliding nuclei" --> "The shape and the size of the overlap is controlled by the shape...colliding nuclei, most dominantly in central collisions."

slide#3:
In the equation of \rho(r,\theta,φ), a parenthesis ")" is missing in the exponential.

slide#3:
"Final Particle Flow" --> "Produced Particle Flow"

slide#3:
"Harmonic flow" --> "Anisotropic flow"

slide#4:
"is just shape" --> "is related to the shape"

slide#4:
"Harmonic flow" --> "Harmonic flow coefficient"

slide#4:
This sentence is unclear: "R_\perp is related to Y_2^0 projected to the transverse plane". R_\perp is related to which aspect of Y_2^0? It's magnitude ?

slide#4:
Equation of "R_\perp^2 = <x^2> +<y^2> =<...>" I don't understand how this works. The term inside <...> is dimensionless because spherical harmonics are dimensionless where as R, x, y are not. Something is missing here.

slide#4:
Please increase the font of the sentence starting with "fluctuation of ...."

slide#5:
Much of what you write on this slide is related to search for CME. The sentence starting with "A precision.." is not needed for your talk. But please somewhere write "Isobar run originally dedicated to CME search". You can also refer to Sergei's talk for more details but that is optional.

slide#6:
"Deviate from unity from mid-central" --> "Deviate from unity in mid-central collisions"

slide#6:
"Request for more and finer bins" --> "Goal is to explore this in finer bins of multiplicity"

slide#7:
"deformation using heavy ion collisions" -->"deformation in heavy ion collision measurements"

slide#8:
Title "variance ratio" --> "[pT]-variance ratio"

slide#8:
"also could be used in conjunction with anisotropy" -->"could also be used in conjunction with anisotropic"

slide#9:
"The large difference of v_2 and v_3 suggests" --> "The large difference of v_2 and v_3 in central isobar collisions"

slide#9:
"[pT] fluctuations also could be used in conjunction with anisotropy flow on the deformation study conclusion are consistent"
-->
"[pT] fluctuations also sensitive to deformation study leads to consistent conclusion:"

slide#9:
"Opportunity to study on nuclear structure at a much shorter scale (~10^-24 s)"
-->
"Opportunity to study nuclear structure at very short time scale (~10^-24 s) accessible through heavy ion collisions"

slide#9:
"A lot of possibility for scan." -->"A future deformed-system scan will be ideal."

slide#9:
"But need to first establish the heavy ion systematics using species with known deformation"
-->
"Species with well known deformation will be useful to better understand the systematics and establish the efficacy of this approach"

Best,
Prithwish


On 2021-10-01 17:46, webmaster--- via Star-fcv-l wrote:

Dear star-fcv-l AT lists.bnl.gov members,
ChunJian Zhang (chun-jian.zhang AT stonybrook.edu) has submitted a material for
a review, please have a look:
https://drupal.star.bnl.gov/STAR/node/56634
---
If you have any problems with the review process, please contact
webmaster AT www.star.bnl.gov
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