STAR Flow, Chirality and Vorticity PWG

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

Subhash Singha ( connectsubhash AT gmail.com ) has commented on a material  
originally submitted by Qiang Hu ( qianghu AT impcas.ac.cn ) at
https://drupal.star.bnl.gov/STAR/presentations/SQM-2024/Measurements-global-and-local-spin-polarization-%CE%9B-and-%C2%AF%CE%9B-AuAu-collisions-RHIC

Comment:
Dear Qiang,

Nice proceedings. I have a few suggestions for your consideration:

General:
Please include line numbers in latex, it helps to refer sentences.
Please run a ispell checker to double check for typos.
For labels figures @ 14.6 GeV --> sqrt{s_NN} = 14.6 GeV (for all figures)

Abstract:
"Λ hyperons’s global and local spin" --> Λ hyperons’ global and local  
spin;

"which may help to understand" --> which can help understand;



"filed." --> field (check here and everywhere else);

"The new measurements of local polarization ... with decreasing energy" -->  
Suggest to switch the ordering first P2y then P2z;

"observalbe," --> observable;

"are designed" --> designed;

"a large uncertainty" --> large uncertainties;



Introduction:

"As shown in Ref. [1, 2], due to the spin-orbit coupling, the quarks could be 
 
globally polarized along to the direction that perpendicular to the

reaction plane" --> Subsequently, the quarks and the final state hadrons with 
 
non-zero spin could be polarized along global angular momentum due to  
spin-orbit coupling [1, 2], which is known as global polarization;

"It will transmit to the hadrons in the final state, which can be detectable  
via hyperons since the daughter baryon prefers to emit along the spin  
direction in the parity-violating week decays" --> Due to parity-violation in 
 
weak decays, the daughter baryon of hyperons prefers to emit along the spin  
direction its parent and they are excellent candidates to measure  
polarization in heavy-ion collisions.;



"carried out the first measurement" --> carried out the polarization  
measurement;

"where the signal was consistent with zero" --> where the signal was  
consistent with zero due lack in statistics.;

"out-of-plane and in-plane are written as follow" --> out-of-plane (P2y) and  
in-plane (P2z) can be written as:;

After equation-2, please also define theta*;



"The net local polarization is the polarization difference between Λ and  
.Λ, it is denoted as Pnet2,y,z = ⟨P2,y,z(Λ)⟩ − ⟨P2,y,z(.Λ)⟩."  
--> move this sentence after the sentence "....(SHE) [5–7]. " and rephrase  
it as

It is predicted that the net local polarization is the polarization  
difference between Λ and .Λ,  denoted as Pnet2,y,z = ⟨P2,y,z(Λ)⟩ −  
⟨P2,y,z(.Λ)⟩, is a sensitive probe for SHE.;

In this proceeding --> In these proceedings;





Results and discussions:

"Figure 2 presents the comparison..." --> The left and right panel of Figure  
2 presents ... and ... respectively.;



"The global polarization of Λ and .Λ are significant energy dependence" --> 
 
The global polarization increases with decrease in energy and the results  
from BES-II and BES-I are consistent within uncertainties.;



"The BES-II results wiht high precision" --> The BES-II results with high  
precision ...;

"Figure 4 shows the net Λ polarization as a function of energy an observable 
 
proposed to probe the SHE" --> The left and right panels Figure 4 present the 
 
net Λ polarization along in-plane and out-of-plane, an observable proposed  
to probe the SHE, as a function of energy.;

"However, the new results of Λ hyperons could not be depicted with current  
models. More calculations are necessary for further understand of the Λ  
polarization, especially at BES energies" --> Don't make it a new paraagraph.



Summary:

"from the RHIC beam energy scan" --> from the second phase of RHIC beam  
energy scan



Make a new sentence: "The upper limit of magnetic field at 19.6 and 27 GeV  
have been estimated."



References:

"[4] STAR Collaboration, Title. Phys. Rev. C 108, 014910 (2023)." --> Remove  
"Title"

  Consider adding STAR Nature paper on lambda polarization in the 
introduction  
when you discuss it.





Figures:

In two panel figures, make sure you have (left) and (right) every where and  
be consistent.



Please double check all the captions are correct.











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