STAR Flow, Chirality and Vorticity PWG

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

Dear Subhash,

Hello. Thank you for further kind comments. Please find the revised draft in https://drupal.star.bnl.gov/STAR/system/files/ICNFP_Proceeding_CZhang_v3.pdf

Your further comments and suggestions are really appreciated.  Thank you.

An Overview of new measurements of flow, chirality, and vorticity from STAR experiment

sure. I will take this. thanks. Initially I want my title only one line that’s why I wrote like that way. 

line 14: for the precision measurements

done 

the STAR's future --> STAR's future

done 

line 22-24: Check the sentence again, if possible break it up into two. A few suggestions: "After the collision, the subsequent fluid motion and the expansion of medium ...", remove “composition”

revised. 

line 31: do you mean electromagnetic and transport properties

topological an electromagenectic properties, removed transport 

line 35: which is known as Chiral Magnetic Effect (CME).

good suggestion. thanks 

line 37: is being pursued

Done. use ‘has been"

line 38: non-central heavy ion

Done 

line 40: Suggest a rephrase: The vorticity of the fluid and the spin orbit coupling could lead to …

thank you for nice suggestion. the older one may be good. 

line 44: Xi^{-}, Omega^{-}

- includes {+ and -}. to make it clear, I remove -

FXT mode --> I think low energy is more important than FXT. So mention the energy range of FXT program

very good suggestions. thank you. I revised this. add the "lower BES energies and FXT collisions"

line 60: do you mean hydrodynamic model with IP-Glasma, MUSIC and UrQMD ? Then rephrase like this

revised it. remove hydrodyamic model. use “ip+Glasma+MUSIC+UrQMD” calculations. 

line 62: calculations

Fixed 

line 75: do you mean better or proper nonflow treatment?

proper nonflow  treatment, add it. 

what is meant by detector acceptance, do you mean enhanced acceptance?

I mean the difference between PHENIX and STAR. that is fixed. but future STAR has the enhanced 1.2 eta range. 

add “enhanced detector acceptance"

use comma after the "and”s

fixed 

various other collision systems, such as O+O, could provide additional constrains and insights on the origin of the near-perfect fluidity in QGP in small system collisions.

good suggestions. thanks. done 

line 90: Can rephrase like \Rho offers information of the initial geometry ….

revised. …was supposed to distinguish the information of the …..

line 109: observed for the first time

good suggestion. I changed it like “….to be around 0.3, observed for the first time…."

line 118: shape and size are strongly correlated …

fixed 

dline 122: method is established and detailed in

done 

line 168: do you mean disappearance of partonic collectivity?

No. the sentence of “disapperance of partonic collectivity” is a little bit dangerous to me. So, my word woule be like this way: The break down of NCQ scaling indicates the disappearance of quark scaling in such low energy collisions"

line 172: Rephrase like: directed flow can depend on ..., remove "properties", add "nature of phase transition”

nice suggestion. thank you 

line 177: Interestingly, the observed difference between pi+ and pi- might be due to the ….

done 

line 186: "expectations from isobar collisions" --> do you mean schematic diagram for isobar collisions

No. just a cartoon, I revised it. 

line 189: do you mean difference in \gamma correlator?

yes. fixed. add “in"

line 206: BES-II data and FXT mode are necessary.

Done 

line 208: newly added ... in 200 GeV Au+Au collisions.

done 

line 223: efficiently finished the bonus d+Au runs

fixed 

line 226: numerous important

done 

line 233: I would rephrase "Lots of theoretical model calculations..." --> Theoretical model calculations are necessary to understand ….

good suggestions. I changed it to “Theoretical model calculations are necessary to understand above physics."

line 235: what is meant by unusual?

{16}^O with small A  is the unusual light nuclei symmetric collisions that LHC and STAR never took it before. pp collision is not belong to this. so the word “unusual” may be appropriate. 

line 243: what is meant by "formed there”?

revised this. make it more clear. “formed there “—> “in small system"

line 253: disentangle between what?

revised the words. “disentangle “ —> “study the effec of "

line 260: "baryon". The meaning of the sentence is not clear, please rephrase.

fixed.I add, "at low energies,…”  

line 273: collectivity measurements in FXT

done

best regards

chunjian 

On Mar 14, 2022, at 11:24 PM, subhash <subhash AT rcf.rhic.bnl.gov> wrote:

Dear Chunjian,

Thanks for addressing my comments. I sign off after the following comments are addressed. Since your proceedings have passed the conference deadline, I am also sending it to the star-talk list.

I think the title sounds better with:
An Overview of new measurements of flow, chirality, and vorticity from STAR experiment

line 14: for the precision measurements
the STAR's future --> STAR's future
line 22-24: Check the sentence again, if possible break it up into two. A few suggestions: "After the collision, the subsequent fluid motion and the expansion of medium ...", remove "composition"
line 31: do you mean electromagnetic and transport properties
line 35: which is known as Chiral Magnetic Effect (CME).
line 37: is being pursued
line 38: non-central heavy ion
line 40: Suggest a rephrase: The vorticity of the fluid and the spin orbit coupling could lead to ...
line 44: Xi^{-}, Omega^{-}
FXT mode --> I think low energy is more important than FXT. So mention the energy range of FXT program
line 60: do you mean hydrodynamic model with IP-Glasma, MUSIC and UrQMD ? Then rephrase like this
line 62: calculations
line 75: do you mean better or proper nonflow treatment?
what is meant by detector acceptance, do you mean enhanced acceptance?
use comma after the "and"s
various other collision systems, such as O+O, could provide additional constrains and insights on the origin of the near-perfect fluidity in QGP in small system collisions.
line 90: Can rephrase like \Rho offers information of the initial geometry ....
line 109: observed for the first time
line 118: shape and size are strongly correlated ...
line 122: method is established and detailed in
line 168: do you mean disappearance of partonic collectivity?
line 172: Rephrase like: directed flow can depend on ..., remove "properties", add "nature of phase transition"
line 177: Interestingly, the observed difference between pi+ and pi- might be due to the ....
line 186: "expectations from isobar collisions" --> do you mean schematic diagram for isobar collisions
line 189: do you mean difference in \gamma correlator?
line 206: BES-II data and FXT mode are necessary.
line 208: newly added ... in 200 GeV Au+Au collisions.
line 223: efficiently finished the bonus d+Au runs
line 226: numerous important
line 233: I would rephrase "Lots of theoretical model calculations..." --> Theoretical model calculations are necessary to understand ....
line 235: what is meant by unusual?
line 243: what is meant by "formed there"?
line 253: disentangle between what?
line 260: "baryon". The meaning of the sentence is not clear, please rephrase.
line 273: collectivity measurements in FXT


Thanks and regards,
Subhash



On 2022-03-15 12:03 AM, Chunjian Zhang wrote:

Dear Subhash,
Thank you for your kind comments. Please find the revised draft in
https://drupal.star.bnl.gov/STAR/system/files/ICNFP_Proceeding_CZhang_v2.pdf
Please let me know if have further nice comments. thank you.

At several places, you used "so-called". I would suggest to remove it.

Done. Only two places, now I remove one.

title: An Overview of flow, chirality and vorticity measurements from STAR experiment

I would like to keep the “New” to mention people this is the 1-2 years
STAR results.

line 22: "After the collision, ... hadronic phase composition." --> Rephrase it. You can try split up the sentence.

revised

line 25: "explore fundamental physics." --> I would suggest specifying which fundamental physics.

here the fundermental means “all possible direction in heavy-ion”.

line 37: "is one of our modern motivations for more than a decade." --> Remove.

done. revised it.

line 41: vortical structure of the medium and it's transport properties

it’s not “it’s” or “its”. I would like to keep hydrodynamical. that’s
different.

line 42: Conside rephrasing the sentence. Remove "Further". I would rephrase it as: measurements of Xi/Omega polarizations, hyperon polarizations at lower energies mode, ...

done

line 46: highlight --> present,

done

recent new progress of --> recent measurements of

Done

line 48: Suggest remove "towards understanding the QGP properties”

done

line 52: "still the great unsolved mystery," --> why do you think it is great unsolved mystery?

Revised. —> unknown.

line 58: I would suggest rephrasing:
1) What determines the initial geometry? 2) What are the connection between initial momentum correlation and hydrodynamics? 3) What are the roles of nucleon and sub-nucleon fluctuations?

good suggestions. thank you.

line 66: What is meant by "pre-flow" here ?

reivsed: pre-flow -> pre-equilibrium flow

line 68: remove "implementing"

Done

line 69: over-predict the v2, while it can reproduce the v3…

done

line 70: I would rephrase as: Figure 2 presents the measurement of v3(pT)... and the results are compared to ..

done

line 72: Suggest rephrase: "v3(pT) show resonable agreement in 3He+Au collisions between STAR and PHENIX.”

done

line 73: Suggest rephrase: However, there is a factor 3-4 discrepancy between STAR and PHENIX …

done

line 75: Remove "The main indications from”

done

line 76: Remove "Of course”

done

What is meant by "future supplemental task force of the measurements". I would suggest simply mention "future measurements of ..... could provide additional constrains and insights on ….”

done

line 82-86: "The correlation between flow harmonics....response with the flow coefficient" --> Consider rephrasing the sentence, it is too long.

done

line 87: "the shape and size of the QGP rely on the fluctuations and the shape" --> Use either ...may rely or can rely on …

done

line 88, 90: Consider rephrasing/breaking this sentence into two.

one is good. two is too short for both.

line 92: I don't get the meaning of "surface is expanded in terms of spherical harmonics.”.

reivsed

line 93: Check the sentence "supposed to be sensitive to distinguish”

done

line 98: add beam energy

done

line 100: essentially flat --> flat wrt to what ?

revised. here I mean instead of. missed “of"

line 102: Suggest rephrase: Note that Trento with initial state fluctuations can capture the trend for Au+Au collisions

Done

line 103: add beam energy

done

line 106: Suggest rephrase: The Rho(v3,pT), which is expected to be fluctuation driven, are almost identical between Au+Au and U+U collision systems across the whole centrality region

done

line 113: Remove "Additional future ... in the Section …”

done

line 122: "measurements only stop at the mean and variance" --> add mean and variance of what?

revised.

line 122: "To save the computationally expensive issue" --> To save the computation

done

line 125: "in detail in Ref.59" --> and detailed in Ref.59

done

line 130: add a reference for "superposition of the independent source picture”

Done

line 133: define UCC

revised. use “ultracentral"

line 134:  mean and kurtosis of pT fluctuations

“to” can not be changed to “and"

line 137: Longitudinal Flow Decorrelations

done

line 142: a broad range of energy dependence -->  energy dependence of what?

Done

line 149: define rn(\eta) as the factorization ratio

Done. add one sentence.

line 151: a strong decorrelation at 27 GeV --> do you mean it for r3?

yes. I revised it to avoid midleading.

line 152: remove "collision enery scan”

remove this? …and … are different meaning. I would like to keep it.

155: "2.5. Collectivity at Fixed-target Program" --> Fixed-target Program doesn't have Collectivity. You can rephrase Collectivity measurements at Fixed-target Program

done.

line 158: with higher baryon chemical potential --> at high baryon density region

done

line 159: "inserting a target into" --> inserting a gold target into

done

line 162: "Figure 7 shows the  first measurements of the beam energy" --> It is not a first measurement.

remove first. FXT 4.5 is the first.

line 167-171: "Such phenomenon has been observed by the NCQ scaling from 3 GeV....disappearance of quark scaling in such low energy collisions." --> Check the sentence, do not seem to be a correct statement

revised.

line 173: Remove "In the semiperipheral nuclear collisions,". The following statement is true for other centralities as well.

done

line 175: Right panel of Figure 8 reports

not right panel. Both.

line 178: What is meant by "the opposite direction between”

the trends of pi+ and pi-  are opposite.

line 181: Relativistic heavy-ion collisions can create the strongest

done

line 182-184: "An imbalance between the numbers ... in such strong interacting ..." --> You should mention under strong B field here

revised

line 194: The details of the observables for CME search can be …

done

line 202: What do you mean by locally vortical fluid?

removed locally

"non-rapidity dependence" --> uniform rapidity dependence

done

line 215: increased vorticity of the system

done
Best Regards
chunjian

On Mar 14, 2022, at 12:22 AM, subhash <subhash AT rcf.rhic.bnl.gov> wrote:
Dear ChunJian,
Thanks for writing this proceedings. The followings are my suggestions based on this version: https://drupal.star.bnl.gov/STAR/system/files/ICNFP_Proceeding_CZhang_v1.pdf
General comments:
I would suggest to get your proceedings proof-read again in your group.
At several places, you used "so-called". I would suggest to remove it.
title: An Overview of flow, chirality and vorticity measurements from STAR experiment
line 22: "After the collision, ... hadronic phase composition." --> Rephrase it. You can try split up the sentence.
line 25: "explore fundamental physics." --> I would suggest specifying which fundamental physics.
line 37: "is one of our modern motivations for more than a decade." --> Remove.
line 41: vortical structure of the medium and it's transport properties
line 42: Conside rephrasing the sentence. Remove "Further". I would rephrase it as: measurements of Xi/Omega polarizations, hyperon polarizations at lower energies mode, ...
line 46: highlight --> present,
recent new progress of --> recent measurements of
line 48: Suggest remove "towards understanding the QGP properties"
line 52: "still the great unsolved mystery," --> why do you think it is great unsolved mystery?
line 58: I would suggest rephrasing:
1) What determines the initial geometry? 2) What are the connection between initial momentum correlation and hydrodynamics? 3) What are the roles of nucleon and sub-nucleon fluctuations?
line 66: What is meant by "pre-flow" here ?
line 68: remove "implementing"
line 69: over-predict the v2, while it can reproduce the v3...
line 70: I would rephrase as: Figure 2 presents the measurement of v3(pT)... and the results are compared to ..
line 72: Suggest rephrase: "v3(pT) show resonable agreement in 3He+Au collisions between STAR and PHENIX."
line 73: Suggest rephrase: However, there is a factor 3-4 discrepancy between STAR and PHENIX ...
line 75: Remove "The main indications from"
line 76: Remove "Of course"
What is meant by "future supplemental task force of the measurements". I would suggest simply mention "future measurements of ..... could provide additional constrains and insights on ...."
line 82-86: "The correlation between flow harmonics....response with the flow coefficient" --> Consider rephrasing the sentence, it is too long.
line 87: "the shape and size of the QGP rely on the fluctuations and the shape" --> Use either ...may rely or can rely on ...
line 88, 90: Consider rephrasing/breaking this sentence into two.
line 92: I don't get the meaning of "surface is expanded in terms of spherical harmonics.".
line 93: Check the sentence "supposed to be sensitive to distinguish"
line 98: add beam energy
line 100: essentially flat --> flat wrt to what ?
line 102: Suggest rephrase: Note that Trento with initial state fluctuations can capture the trend for Au+Au collisions
line 103: add beam energy
line 106: Suggest rephrase: The Rho(v3,pT), which is expected to be fluctuation driven, are almost identical between Au+Au and U+U collision systems across the whole centrality region
line 113: Remove "Additional future ... in the Section ..."
line 122: "measurements only stop at the mean and variance" --> add mean and variance of what?
line 122: "To save the computationally expensive issue" --> To save the computation
line 125: "in detail in Ref.59" --> and detailed in Ref.59
line 130: add a reference for "superposition of the independent source picture"
line 133: define UCC
line 134:  mean and kurtosis of pT fluctuations
line 137: Longitudinal Flow Decorrelations
line 142: a broad range of energy dependence -->  energy dependence of what?
line 149: define rn(\eta) as the factorization ratio
line 151: a strong decorrelation at 27 GeV --> do you mean it for r3?
line 152: remove "collision enery scan"
155: "2.5. Collectivity at Fixed-target Program" --> Fixed-target Program doesn't have Collectivity. You can rephrase Collectivity measurements at Fixed-target Program
line 158: with higher baryon chemical potential --> at high baryon density region
line 159: "inserting a target into" --> inserting a gold target into
line 162: "Figure 7 shows the  first measurements of the beam energy" --> It is not a first measurement.
line 167-171: "Such phenomenon has been observed by the NCQ scaling from 3 GeV....disappearance of quark scaling in such low energy collisions." --> Check the sentence, do not seem to be a correct statement
line 173: Remove "In the semiperipheral nuclear collisions,". The following statement is true for other centralities as well.
line 175: Right panel of Figure 8 reports
line 178: What is meant by "the opposite direction between"
line 181: Relativistic heavy-ion collisions can create the strongest
line 182-184: "An imbalance between the numbers ... in such strong interacting ..." --> You should mention under strong B field here
line 194: The details of the observables for CME search can be ...
line 202: What do you mean by locally vortical fluid?
"non-rapidity dependence" --> uniform rapidity dependence
line 215: increased vorticity of the system
Thanks and regards,
Subhash
On 2022-02-26 10:32 AM, 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/58541
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