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star-fcv-l - [[Star-fcv-l] ] STAR presentation by Chenlu Hu for Quark Matter 2025 got commented by Subhash Singha

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Subject: STAR Flow, Chirality and Vorticity PWG

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  • Subject: [[Star-fcv-l] ] STAR presentation by Chenlu Hu for Quark Matter 2025 got commented by Subhash Singha
  • Date: Fri, 8 Nov 2024 04:16:23 -0500

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

Subhash Singha ( connectsubhash AT gmail.com ) has commented on a material
originally submitted by Chenlu Hu ( huchenlu AT ucas.ac.cn ) at
https://drupal.star.bnl.gov/STAR/presentations/Quark-Matter-2025/First-Measurements-Hyper-Nucleus-3%CE%9BH-Global-Polarization-AuAu-collis

Comment:
Dear Chenlu, All,
Richard made some good points. Since I am one of the PAs, let me attempt and
suggest a few changes to make the physics message more clear. 
l#6-9: "Both large angular momenta  ... where baryon density is
high" --> The large angular momentum generated in non-central heavy-ion
collisions contributes to the formation of vorticity within the medium, which

subsequently induces polarization of particles with non-zero spin.(I suggest
we remove magnetic field part, because at this energy we will not be able to
probe and it's not relevant here)

l#10-11: Since you want to focus on the high baryon region, how about the
following wordings:Significant ... baryon region" --> The global
polarization of Λ-hyperons near mid-rapidity increases at lower energies,
which can be attributed to the correlation between angular momentum and
enhanced baryon stopping. Recent model predictions suggest that the decay
products of polarized hyper-nuclei (H3Λ) are highly sensitive to their spin
structure. Additionally, in regions of high baryon density, the enhanced
production of H3Λ makes their polarization measurement feasible.l#13: remove

"in nuclear collisions"l#14: the global spin polarization"in 3 GeV Au+Au
collisions" --> using  3 GeV Au+Au collisions with about 2 billion events
collected during 2021 by STAR.
l#15: remove "from 2 billion events."l#17: Finally, the results will be
compared with model predictions based on different assumptions of spin
structures.

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