STAR Flow, Chirality and Vorticity PWG

[webmaster AT star.bnl.gov]

Dear star-fcv-l AT lists.bnl.gov members,

Prithwish Tribedy ( ptribedy AT bnl.gov ) has commented on a material originally 
 
submitted by Priyanshi Sinha ( priyanshisinha AT students.iisertirupati.ac.in )  
at
https://drupal.star.bnl.gov/STAR/presentations/AUM-2024/Highlights-STAR-experiment-flow-measurements

Comment:
Very nice slides!! I sign off with the following comments.
Slide#2: It would be good to add p/d/He+Au on lower left part of systems scan 
 
at top RHIC energy
"colliders energies" --> "collider energies"
Slide#3: TOF has a coverage of |\eta|<0.9, cross check acceptance of  
different systems
Slide#6: "over ten units" --> "over nine units (|\eta|<1.5 & 2.1<|\eta|<5.1)"
"Precision measurement for limiting fragmentation", since "limiting  
fragmentation" is a phenomenon and not a measurable observable, you need to  
revise accordingly.
You can write something like "precision measurement of v1 enables observation 
 
of limiting fragmentation"
Slide#7:
"Could be due to longer lived EM field and shorter lifetime of fireball" -->  
"Could be due to EM-field effect, longer-lived field and shorter lifetime of  
fireball"
I am not sure about last bullet, we do not see increase with pt, we see  
increase and then decrease.
How about "Indication of strong pt dependence of splitting"
Slide#8:
"scale breaking", what do you mean by it? Please clarify
"v1,excess" --> "v1 excess"
Slide#10: The last bullet is not clear "Weak Energy dependence à More  
sensitive to initial state than final"
Slide#13: " Scaling become a gradually better" --> " Scaling becomes  
gradually better"
Slide#14: "|v3{Ψ1}| increases towards peripheral collisions --> Geometry  
drives v3{Ψ1}" This is not clear, maybe you should put the cartoon of page 4 
 
here.
Also, rephrase it to indicate that "Observation of non-zero v3{\Psi_1} and  
increase in peripheral collisions --> Geometry driven v3 at lower energy"
Slide#18: This sentence is incorrect: "v2 (p+Au) < v2(d+Au, 3He+Au)  
collisions --> Influence from sub-nucleonic eccentricity fluctuations"
I would suggest you to modify it to:
"v3 (p+Au) ~ v3(d+Au) ~ v3(3He+Au) -->  Influence from sub-nucleonic scale  
geometry fluctuations"
Slide#19:
"v3 (O+O) ≈ v2(d+Au) ≈ v2(3He+Au)" There is a typo, I think it should be  
"v3 (O+O) ≈ v3(d+Au) ≈ v3(3He+Au)"
Please check ref: PRC 94 (2016), 024919, I don't see where it says "εn(d+Au) 
 
≈ εn(3He+Au); n=2,3"
Slide#22:
"EM field effect from a shorter lifetime of fireball observed towards lower  
beam energies" --> "Observation consistent with EM-field effect and shorter  
lifetime of fireball observed towards lower beam energies"
This bullet is not clear "Anti-flow of mesons observation indicates towards  
nuclear shadowing effect" please revise.












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