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Subject: STAR Flow, Chirality and Vorticity PWG

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Re: [Star-fcv-l] FCV PWG meeting on 09/Aug/2023 Wed. 9:30 AM EDT

From: Sooraj Radhakrishnan <skradhakrishnan AT lbl.gov>
To: "STAR Flow, Chirality and Vorticity PWG" <star-fcv-l AT lists.bnl.gov>
Subject: Re: [Star-fcv-l] FCV PWG meeting on 09/Aug/2023 Wed. 9:30 AM EDT
Date: Sun, 20 Aug 2023 21:14:30 -0700

Hi CWR,

How can we understand the differences in the raw rho_00 between yours and from the published results? For background, I dont see a reason for it contribute differently in the two approaches, as both are utilizing correlations relative to the EP of the candidates, and S/B ratio also enters the calculations in the same way. At 200 GeV also there is sizeable difference, even though the statistical uncertainties are better. From S18 I see that the results are quite sensitive to the signal and background fitting. Which method are these results from? Do you have similar slide for the other method with similar variation of fitting functions?

thanks

Sooraj

On Sun, Aug 20, 2023 at 2:42 PM Robertson, Charles William via Star-fcv-l <star-fcv-l AT lists.bnl.gov> wrote:

Hello Diyu and Xu,

Thanks to Diyu for pointing out a problem. It was indeed an error in my code. It was newly introduced when I changed from our previous fit assuming 1/3 for background. I forgot to convert the fit <cos^2> to rho00^obs.

There was also an issue in the systematic uncertainty calculation. I had three variations for fit functions and three variations for fit ranges. I added all three variations in quadrature without taking the rms. This is now corrected.

The new plot is on s9 of the pdf.

I'm also including a comparison plot of the raw data on s14. Thanks to Xu for sending your raw data. I assume your raw data are not corrected for EP resolution, so I'm also plotting our raw data before EP resolution correction. The two raw data results (open black vs. open red) do not seem to agree. I've also appended a few slides from our very early studies using the yield method. We found the results were very sensitive to how the background was modeled.

The slides can be found here: https://drupal.star.bnl.gov/STAR/system/files/PreliminaryRequest_3.pdf

Thank you,

-CW

From: Star-fcv-l <star-fcv-l-bounces AT lists.bnl.gov> on behalf of 孙旭 via Star-fcv-l <star-fcv-l AT lists.bnl.gov>
Sent: Saturday, August 19, 2023 10:17 PM
To: STAR Flow, Chirality and Vorticity PWG <star-fcv-l AT lists.bnl.gov>
Cc: 孙旭 <xusun AT impcas.ac.cn>
Subject: Re: [Star-fcv-l] FCV PWG meeting on 09/Aug/2023 Wed. 9:30 AM EDT

---- External Email: Use caution with attachments, links, or sharing data ----

Hi Fuqiang,

Please find the raw rho00 vs. energy in the following link:
https://nam04.safelinks.protection.outlook.com/?url="https%3A%2F%2Fdrupal.star.bnl.gov%2FSTAR%2Fblog%2Fsunxuhit%2FRaw-rho00-phi-meson-11-200-GeV&data=05%7C01%7Crober558%40purdue.edu%7C3431b1b6dfe2409614bb08dba123ba9f%7C4130bd397c53419cb1e58758d6d63f21%7C0%7C0%7C638280947091144402%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=2SarMmhV3WMbkIa8JJ8YD%2BTndRG4fxjpCV0J%2FKWUFNs%3D&reserved=0

The number could also be found below:
11GeV: rhoDef = 0.35033 +/- 0.00834608
19GeV: rhoDef = 0.345301 +/- 0.00353585
27GeVRun18: rhoDef = 0.346832 +/- 0.00116909
39GeV: rhoDef = 0.336374 +/- 0.00147845
62GeV: rhoDef = 0.342335 +/- 0.00196637
200GeVRun14: rhoDef = 0.334078 +/- 0.00050915

Please NOTE:

1. the zig-zag feature is already very significant in the raw rho00 plot.
2. The rho00 at 27 GeV your group presented in FCV meeting is significantly lower than our raw rho00. Before talking about anything else, it's crucial to address the fundamental question of why your group's implementation of the invMass method yields a result so divergent from the one obtained using the conventional method, particularly at the raw rho00 level. This question is especially pertinent when considering that in all v2 analyses, the two methods consistently produce same results.

Best,

Xu for the PAs

> -----Original Messages-----
> From: "Wang, Fuqiang via Star-fcv-l" <star-fcv-l AT lists.bnl.gov>
> Sent Time: 2023-08-18 11:04:12 (Friday)
> To: "STAR Flow, Chirality and Vorticity PWG" <star-fcv-l AT lists.bnl.gov>
> Cc: "Wang, Fuqiang" <fqwang AT purdue.edu>
> Subject: Re: [Star-fcv-l] FCV PWG meeting on 09/Aug/2023 Wed. 9:30 AM EDT
>
> Dear PA’s of the phi spin alignment Nature paper,
>
> As agreed upon during today’s special FCV meeting, please provide the RAW rho_00 data of the phi meson spin alignment vs. beam energy, corresponding to the money plot of the Nature paper.
>
> Best regards,
> Fuqiang
>
> > On Aug 8, 2023, at 2:30 AM, subhash via Star-fcv-l <star-fcv-l AT lists.bnl.gov> wrote:
> >
> > ---- External Email: Use caution with attachments, links, or sharing data ----
> >
> >
> > Dear All,
> >
> > We shall have our weekly FCV PWG meeting this Wednesday (09/Aug/2023) at
> > 9:30 AM EDT. As you know the deadline for preliminary approvals is the
> > week of August 14 and submission of talk/poster to FCV PWG is August 20.
> > Therefore, this week and next week we would like to focus on Quark
> > Matter related analysis updates and preliminary approval. We would like
> > to ask the following analyzers to present an update:
> > Zuowen, Chengdong, Xingrui, Rishabh & Shengli
> >
> > The agenda items will be collected at:
> > https://nam04.safelinks.protection.outlook.com/?url="https%3A%2F%2Fdrupal.star.bnl.gov%2FSTAR%2Fblog%2Fjjiastar%2Fbulkcorr&data=05%7C01%7Crober558%40purdue.edu%7C3431b1b6dfe2409614bb08dba123ba9f%7C4130bd397c53419cb1e58758d6d63f21%7C0%7C0%7C638280947091144402%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=%2FY4xQyTbHj2vdCGPMCl9AQ32IJ9Hibi1BovYYWBuAOQ%3D&reserved=0
> >
> > We would also like to discuss the followings in order to assess your
> > analysis status:
> > -- list of promised results observables, collision system, beam energies
> > -- status/readiness of your analysis, new preliminary requests
> > -- any potential issues, show stoppers, centrality/embedding etc.
> > For preliminary request you can use this template:
> > https://nam04.safelinks.protection.outlook.com/?url="https%3A%2F%2Fdrupal.star.bnl.gov%2FSTAR%2Fsystem%2Ffiles%2FPrelim_Request_template.pdf&data=05%7C01%7Crober558%40purdue.edu%7C3431b1b6dfe2409614bb08dba123ba9f%7C4130bd397c53419cb1e58758d6d63f21%7C0%7C0%7C638280947091144402%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=%2FbfFuksSPqFH7rfWCMLnl2e7E4dwRpKpYjGn2DAoMk8%3D&reserved=0
> >
> > Zoom details are copied below.
> >
> > Thanks and regards,
> > Prithwish, Zhenyu and Subhash
> >
> >
> > ZOOM LINK FOR FCV MEETING:
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Sooraj Radhakrishnan

Research Scientist,

Department of Physics

Kent State University

Kent, OH 44243

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

Re: [Star-fcv-l] FCV PWG meeting on 23/Aug/2023 Wed. 9:30 AM EDT , (continued)
- Re: [Star-fcv-l] FCV PWG meeting on 09/Aug/2023 Wed. 9:30 AM EDT, Wang, Fuqiang, 08/17/2023
  - Re: [Star-fcv-l] FCV PWG meeting on 09/Aug/2023 Wed. 9:30 AM EDT, ADITYA PRASAD DASH, 08/17/2023
  - Re: [Star-fcv-l] FCV PWG meeting on 09/Aug/2023 Wed. 9:30 AM EDT, 孙旭, 08/19/2023
    - Re: [Star-fcv-l] FCV PWG meeting on 09/Aug/2023 Wed. 9:30 AM EDT, Robertson, Charles William, 08/20/2023
      - Re: [Star-fcv-l] FCV PWG meeting on 09/Aug/2023 Wed. 9:30 AM EDT, Sooraj Radhakrishnan, 08/21/2023
        
        Re: [Star-fcv-l] FCV PWG meeting on 09/Aug/2023 Wed. 9:30 AM EDT, Robertson, Charles William, 08/22/2023
- Re: [Star-fcv-l] FCV PWG meeting on 09/Aug/2023 Wed. 9:30 AM EDT, Xing Wu, 08/08/2023
- Re: [Star-fcv-l] FCV PWG meeting on 09/Aug/2023 Wed. 9:30 AM EDT, Zuowen Liu, 08/10/2023