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 Xingrui Gou ( gouxingrui123 AT 163.com ) at
https://drupal.star.bnl.gov/STAR/presentations/Quark-Matter-2023/Measurements-Global-and-Local-Polarization-Hyperons-Isobar-Collision

Comment:
Nice abstract! The current version (v2) is already in a very good shape. A  
few comments from my side:

I think the current title is too long and technical. Here is my proposed  
revision:

"Hyperon Polarization in Isobar Collisions and Correlation of Global  
Polarization with Directed Flow from STAR"

"the global and local" --> "global and local" (I think)

"due to collective velocity field." --> "due to transverse collective  
velocity field."

Although I think the right thing to say would be "transverse anisotropic  
velocity field" or "anisotropic transverse expansion" instead of "transverse  
collective velocity field". I am not sure what "radial flow does", saying  
"anisotropic" is better.

Here is my revision of the first sentence:
"The observation of hyperon polarization has revealed the existence of large  
vorticities in the medium created by heavy-ion collisions. Global  
polarization indicates vorticities perpendicular to the reaction plane due to 
 
the system's orbital angular momentum, while local polarization indicates  
vorticities along the beam direction due to anisotropic transverse expansion  
of the medium."


"Ru+Ru and Zr+Zr" --> "isobar Ru+Ru and Zr+Zr collisions"

"global polarization" --> "we present the measurements of global  
polarization"

"are measured" --> "measured"

So, here my revision of the sentence 7-10:
With the high-statistics data collected by the STAR experiment for isobar  
Ru+Ru and Zr+Zr collisions at $\sqrt{s_{\rm{NN}}} =$ 200 GeV, we present the  
measurements of global polarization for $\Lambda/\bar{\Lambda}$ and  
$\Xi^{\pm}$ as functions of centrality, transverse momentum, pseudorapidity,  
and azimuthal angle relative to the event plane.

"larger magnetic" --> "larger expected magnetic"

line 13:
"third-order event planes will be presented." --> "third-order event planes,  
in isobar collisions will be presented."

line 14:
Put a space after the period (.)

Same line:

"previous measurements at RHIC and the LHC"
-->
"previous measurements in Au+Au and Pb+Pb collisions at RHIC and LHC,  
respectively,"


Remove "On the other hand," there is no real connection with the previous  
para, you're starting a new topic. I suggest you do the following revision:

"On the other hand, the similar trend in the energy dependence between global 
 
polarization and the slope of directed flow hints at a strong correlation  
between the initial tilt of the system and the vorticity."

-->

"Previous measurements have shown a similar trend in the energy dependence  
between the global polarization and the slope of directed flow, suggesting a  
strong correlation between the initial tilt of the system and the vorticity."

Let's make the last line a bit appealing. How about:

"For the first time, this correlation is investigated, and the dependence of  
global polarization of $\Lambda$ hyperons on the first-order flow vector  
($q_1$) is presented in Au+Au collisions at $\sqrt{s_{\mathrm{NN}}} = 19.6$  
GeV."









---
If you have any problems with the review process, please contact  
webmaster AT www.star.bnl.gov