STAR Flow, Chirality and Vorticity PWG

[Han-sheng Li <li3924 AT purdue.edu>]

Dear Huan,

I got the average intercept and statistics error from a constant fit. For the systematic error, I have many systematic variations of the two points and apply constant fits on those variations. Based on Barlow description I got the systematic error for the constant fit.

Best regards,

Han-Sheng

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From: Star-fcv-l <star-fcv-l-bounces AT lists.bnl.gov> on behalf of Wang, Fuqiang via Star-fcv-l <star-fcv-l AT lists.bnl.gov>
Sent: Sunday, September 3, 2023 12:32:29 PM
To: Huan Zhong Huang <huang AT physics.ucla.edu>
Cc: Wang, Fuqiang <fqwang AT purdue.edu>; STAR Flow, Chirality and Vorticity PWG <star-fcv-l AT lists.bnl.gov>
Subject: Re: [Star-fcv-l] Please update your slides on drupal for approval

 

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Hi Huan,

Yes, the q2 is from all charged hadrons within |eta|<0.3. The POIs are from outside regions |eta|>0.3.

In the ESE analysis the Ks region shouldn’t be anything special from other regions. So I wouldn’t particularly mention Ks region. There may be generic issues with inv. mass method. We will definitely look into it. 

I think it was an average obtained from a constant fit to the low (high) mass points. Han-sheng, can you answer how you get the average intercept and error?

Best regards,

Fuqiang

On Sep 3, 2023, at 12:06 PM, Huan Zhong Huang <huang AT physics.ucla.edu> wrote:



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Fuqiang,

  I assume that when you do the ESE you used all particles in the event without the invariant mass selection. If the invariant mass is correlated with v2-background, it is possible that some region of invariant mass the background is higher and some region becomes lower so that the overall event background is balanced. Ks is a very good handle: very narrow and prominent in your inv mass distribution and the region has the largest correlation signal. It does not bother me if you does not want to mention Ks, and I trust that you will study this.

  I asked Han-Sheng for the numbers of the low mass two points because it is not clear how the combined data number was obtained from the numbers in the figure for the errors. It could just be visual mis-perception of reading the error bars on the figure. But it will be good to check out the numbers.

  Regards,

  Huan

 

From: Wang, Fuqiang <fqwang AT purdue.edu>
Sent: Sunday, September 3, 2023 6:23 AM
To: STAR Flow, Chirality and Vorticity PWG <star-fcv-l AT lists.bnl.gov>
Cc: Zhiwan Xu <zhiwanxu AT physics.ucla.edu>; Huan Zhong Huang <huang AT physics.ucla.edu>
Subject: Re: [Star-fcv-l] Please update your slides on drupal for approval

 

Hi Huan, 

 

The idea of ESE is to remove those flow-induced background, including Ks. So I wouldn’t include a statement like “Ks effects” in the summary. The intercepts from the Ks region and from the lower mass region are consistent within statistical uncertainties, so I wouldn’t read into the numbers too much right now. We will certainly do further studies. 

Best regards,

Fuqiang

On Sep 3, 2023, at 1:22 AM, Huan Zhong Huang via Star-fcv-l <star-fcv-l AT lists.bnl.gov> wrote:



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Han-Sheng,

  Could you send the actual numbers including both the statistical and systematic errors from your intercept figure on Zhiwan’s slide 9? I am looking at the sizes of the error bars and the numbers listed in the figure, it will be good to understand how you obtained the numbers.

  As I have indicated to Fuqiang, it will be good to study the potential effect of Ks as well since the Ks region has the largest number. Therefore, it will be good to mention both residual nonflow and Ks effects in the summary.

  Thanks. Regards,

  Huan

 

From: Star-fcv-l <star-fcv-l-bounces AT lists.bnl.gov> On Behalf Of Han-sheng Li via Star-fcv-l
Sent: Saturday, September 2, 2023 10:05 PM
To: Zhiwan Xu <zhiwanxu AT physics.ucla.edu>; STAR Flow, Chirality and Vorticity PWG <star-fcv-l AT lists.bnl.gov>
Cc: Han-sheng Li <li3924 AT purdue.edu>
Subject: Re: [Star-fcv-l] Please update your slides on drupal for approval

 

Hi Zhiwan,

 

The new plot on the summary slide looks good to me.

Thanks for organizing the nice slides.

 

Best regards,

Han-Sheng

 

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From: Zhiwan Xu <zhiwanxu AT physics.ucla.edu>
Sent: Saturday, September 2, 2023 11:53:33 PM
To: STAR Flow, Chirality and Vorticity PWG <star-fcv-l AT lists.bnl.gov>
Cc: Han-sheng Li <li3924 AT purdue.edu>; Wang, Fuqiang <fqwang AT purdue.edu>
Subject: Re: [Star-fcv-l] Please update your slides on drupal for approval

 

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Hi Fuqiang and FCV conveners,
 Thank you for the comments. I have included the high-mass point in the middle Psi_2 plots.
 Please find my QM slides here:
 https://nam04.safelinks.protection.outlook.com/?url="https%3A%2F%2Fdrupal.star.bnl.gov%2FSTAR%2Fpresentations%2FQuark-Matter-2023%2FSearch-Chiral-Magnetic-and-Vortical-Effects-Using-Event-Shape-Vari-0&data=05%7C01%7Cli3924%40purdue.edu%7Ce247ef67984e4482ef2b08dbac39bcd6%7C4130bd397c53419cb1e58758d6d63f21%7C0%7C0%7C638293136226002499%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=c5Z01tQ0cvJbyQKqX%2FdIKMNp53vP62fp7rvpFEbTiUE%3D&reserved=0

Best,
Zhiwan
------------------------------------
Zhiwan Xu,
Department of Physics and Astronomy, UCLA
zhiwanxu AT physics.ucla.edu


----- Original Message -----
From: "Fuqiang Wang" <fqwang AT purdue.edu>
To: "STAR Flow, Chirality and Vorticity PWG" <star-fcv-l AT lists.bnl.gov>
Cc: "Zhiwan Xu" <zhiwanxu AT physics.ucla.edu>, "Han-sheng Li" <li3924 AT purdue.edu>
Sent: Saturday, September 2, 2023 10:39:27 PM
Subject: Re: [Star-fcv-l] Please update your slides on drupal for approval

Hi Zhiwan,

I think Han-sheng is making his plot as he just realized that you’re waiting on his plot. But actually your plot looks good to me so we should just use your plot. Could you also quickly include the high mass point? Han-sheng should double check the plot but all is good to me.

Best regards,
Fuqiang

> On Sep 2, 2023, at 11:13 PM, Zhiwan Xu via Star-fcv-l <star-fcv-l AT lists.bnl.gov> wrote:
> ---- External Email: Use caution with attachments, links, or sharing data ----
>
>
> Dear Conveners,
> Please find my QM slides here:
> https://nam04.safelinks.protection.outlook.com/?url="https%3A%2F%2Fdrupal.star.bnl.gov%2FSTAR%2Fpresentations%2FQuark-Matter-2023%2FSearch-Chiral-Magnetic-and-Vortical-Effects-Using-Event-Shape-Vari-0&data=05%7C01%7Cli3924%40purdue.edu%7Ce247ef67984e4482ef2b08dbac39bcd6%7C4130bd397c53419cb1e58758d6d63f21%7C0%7C0%7C638293136226002499%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=c5Z01tQ0cvJbyQKqX%2FdIKMNp53vP62fp7rvpFEbTiUE%3D&reserved=0
> *Note:  I included three conclusion plots on the summary slide, following the suggestion by conveners.
>  Regarding the middle Psi_2 plot, I have not yet received input from the other PA, Han-Sheng.
>  Therefore, I adopted the plot I generated myself.
>  Once he shares his version, I will circulate it to the working group for approval of the update.
>
> Best,
> Zhiwan
>
> ------------------------------------
> Zhiwan Xu,
> Department of Physics and Astronomy, UCLA
> zhiwanxu AT physics.ucla.edu
>
> ----- Original Message -----
> From: "zhchen via Star-fcv-l" <star-fcv-l AT lists.bnl.gov>
> To: star-fcv-l AT lists.bnl.gov
> Cc: "zhchen" <zhchen AT rcf.rhic.bnl.gov>
> Sent: Saturday, September 2, 2023 10:53:54 AM
> Subject: [Star-fcv-l] Please update your slides on drupal for approval
>
> Dear FCV QM speakers,
>
> Please update your slides on drupal so we can sign off.
> Please reply to this email once your final draft has been uploaded. If
> you already did please also let us know.
> Thanks a lot!
>
> Cheers,
> SPZ
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