STAR Flow, Chirality and Vorticity PWG

["Robertson, Charles William" <rober558 AT purdue.edu>]

Hello Subhash,

Thank you for your comments and suggestions. 

My updated abstract can be found here on the same node:

https://drupal.star.bnl.gov/STAR/system/files/QuarkMatter2023Abstract_2_0.pdf

Thanks,

-CW

---

From: Star-fcv-l <star-fcv-l-bounces AT lists.bnl.gov> on behalf of subhash via Star-fcv-l <star-fcv-l AT lists.bnl.gov>
Sent: Thursday, April 27, 2023 5:03 AM
To: STAR Flow, Chirality and Vorticity PWG <star-fcv-l AT lists.bnl.gov>
Subject: Re: [Star-fcv-l] STAR presentation by Charles Robertson for Quark Matter 2023 submitted for review

 

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Dear CWR,

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

"In heavy ion collisions that are not exactly head-on, a large Orbital
Angular Momentum (OAM) is produced that can affect the polarization of
the quarks inside the quark-gluon plasma."
-->
In non-central heavy ion collisions, a large Orbital Angular Momentum
(OAM) is produced.

"This polarization influences the production of vector mesons and can
cause global spin alignment." --> A part of OAM can induce polarization
of the quarks and anti-quarks, hence the vector mesons, inside the
medium.

l#10-11: from the first phase of the RHIC Beam Energy Scan (BES-I) Au+Au
collisions.
Suggest to remove: "and found energy dependence."

"The analysis method employed resonance yield in the angle (θ∗) between
the decay daughter’s momentum and the OAM and relied on acceptance and
efficiency corrections that are also dependent of θ∗."
-->
The global spin alignment, quantified by the 00th coefficient of the
spin density matrix rho_00, is measured by a fit to the acceptance and
efficiency corrected \phi meson yield versus polar angle (\theta*)
between the daughter kaon in parent's rest frame and OAM direction.

"In this poster, we present an alternative method to extract the spin
alignment without analyzing the yield vs. θ∗, but the ⟨cos2θ∗⟩ as a
function of pair invariant mass."
-->
In this poster, we present an alternative approach to extract the
\rho_00 by utilizing ⟨cos2 θ∗⟩ distribution as a function of
pair-invariant mass instead of analyzing the \phi meson yields in cos θ∗
bins.

I would suggest to be conservative and suggest to remove the last part,
ie, "We report preliminary results for this method and discuss our
results in the context of the energy dependence previously measured by
STAR." Instead you can simply mention we will compare measurements using
both these methods.

Thanks and regards,
Subhash

On 2023-04-22 04:16 AM, webmaster--- via Star-fcv-l wrote:
> Dear star-fcv-l AT lists.bnl.gov members,
>
> Charles Robertson (rober558 AT purdue.edu) has submitted a material for a
> review, please have a look:
> https://drupal.star.bnl.gov/STAR/node/63531
>
> Deadline: 2023-05-01
> ---
> If you have any problems with the review process, please contact
> webmaster AT www.star.bnl.gov
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