STAR Flow, Chirality and Vorticity PWG

[Ding Chen <ding.chen AT email.ucr.edu>]

Dear Sooraj,

Thank you for bringing this to our awareness. I noticed that in your PWGc report last week as well.

P24ia is the way to go if it resolves the issues as expected. Then I have no problem with it. 

Best regards,

Ding

On Tue, Apr 16, 2024 at 2:32 PM Sooraj Radhakrishnan <skradhakrishnan AT lbl.gov> wrote:

Hi Ding,

   We have a new production with P24ia library ongoing that address these issues. It fixes the acceptance issue in P23id production and has all the updates missing in P21id. See the email from Gene below 

Best,

Sooraj

//---------- Forwarded message ---------

From: Van Buren, Gene via Starprod-l <starprod-l AT lists.bnl.gov>
Date: Tue, Apr 16, 2024 at 11:06 AM
Subject: Re: [Starprod-l] P24ia production of BES-II FXT datasets
To: discussion list for all aspects of STAR's offline data production <starprod-l AT lists.bnl.gov>
Cc: Van Buren, Gene <gene AT bnl.gov>

Update on the P24ia production of the BES-II fixed target (FXT) datasets:
- The 2019 datasets are close to finishing
- Four of the 2020 datasets appear to be completed and we have not heard of any issues: 5p75, 7p3, 9p8, 31p2:
- Two of the 2020 datasets were started, but there was a mis-step in the ETOF calibration, so what is on disk will be erased and re-produced when ready: 13p5, 19p5
- Other FXT datasets to come.

-Gene
//

On Fri, Apr 12, 2024 at 1:39 PM Ding Chen via Star-fcv-l <star-fcv-l AT lists.bnl.gov> wrote:

Dear convenors and all,

There are two versions of the sqrt(s_NN) = 3.2 GeV FXT dat (production_4p59GeV_fixedTarget_2019); one is the P21id version, and the other is the P23id. 

For the P21id version, the TPC calibration was not ideal for the proton:  which requires bin-bin correction, as shown in the figure below:

https://drupal.star.bnl.gov/STAR/system/files/Racz_FCV_19Apr2023.pdf

For the P23id version, the TPC calibration and the EPD calibration are updated, where the quality of the nSigmaProton is improved in the P23id version compared to the plot above -

https://drupal.star.bnl.gov/STAR/system/files/AnalysisNote_v1_1.pdf

This would make it seem that analyzers should just move on to the P23id version. Whereas Yue figures that for the P23id version, there is an inconsistency in the coverage of the phase space for helium-3

"The difference is coming from cluster size in time buckets (min = 3.5, max=16.5) from TpcnTbk table"

https://drupal.star.bnl.gov/STAR/system/files/LightNucleiFlowWithEfficiency_Yue20231129.pdf

For the coming conferences like CPOD, I believe we can pick either production we are currently working on. 

The question is for future publication and other analyses, which version would be suitable to choose, is it gonna be case by case, or working group pick one production for all analyses? More specifically, for light nuclei with helium-3 and above, which production would you like to recommend? I can make a presentation at FCV on Wednesday so we can discuss this if needed.

Please let me know if you have any comments, suggestions, or questions.

Best regards,

Ding

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--

Sooraj Radhakrishnan

Research Scientist,

Department of Physics

Kent State University

Kent, OH 44242

Physicist Postdoctoral Affiliate

Nuclear Science Division
Lawrence Berkeley National Lab
MS70R0319, One Cyclotron Road

Berkeley, CA 94720

Ph: 510-495-2473

Email: skradhakrishnan AT lbl.gov