STAR Correlations and Fluctuations PWG

[Hanna Paulina Zbroszczyk <hanna.zbroszczyk AT pw.edu.pl>]

Dear Ke,

Thank you for posting your presentation and the website of the paper proposal.

I think your analysis is mature and should move forward, here I need to clarify few things.

In general I think more details should be added for discussion.

My comments are related to your PWGC Preview Draft:

https://drupal.star.bnl.gov/STAR/system/files/202304_PWGC_preview_draft.pdf

I have the following comments:

Slide 3: Not sure if you need this to have put the slide, but can you explain how one can distinguish between coalescence and thermal scenarios with femtoscopy method?

Slide 4: Can you explain the parameters stored in the table? I understand separate columns but you did not explain separate rows. Do they refer to papers mentioned below? Can you indicate which one describes which parametrization?

Slide 6: As you know, in case of identical particle combinations, one deals with the QS effect as well. Can you add this to the slide?

Slide 7: what is the reference of shown figures? Can you add more details here? A description's of axes is missing. A question may appear here: how with negative f_0 would you recognize between 2nd and 3rd case? How to distinguish between attractive (& bound) and repulsive cases? 

 

 Slide 9: As you may know, recently, it was discussed (last CM and before) that nSigma for protons (and other particle species should be investigated as well) is not centered at 0 (for all FXT datasets, including 3 GeV). We need to know how did you deal with this shift in your analysis?

Can you comment on such a high particle purity (above p>3-4 GeV/c in case of protons and deuterons) in case of such limited statistics shown at (pT, Y) plots?

Slide 10: What is the systematic effect of nSigma selection? Moreover, how do you shift non-zero nSigma?

What is the systematic contribution to different range fitting? Can you show also those effects?

How about a resolution? Can you show these studies?

Can you list the effects you considered, also pointing out that you check not to contribute?

It would be good to have information on how they contribute (in %).

Slide 13: Figure 2: SMASH + Coalesce is shown only for the p-d case. Any reason why coalescence is not shown in the d-d case? I don't see any orange line for 20-40% or 40-60%.

Slide 14: Figure 3: what is your interpretation that all of d-d case are below any model prediction? Moreover, according to the d-d case, they are all closer to the direct production.

"The upper limits of these bands, long dashed lines, stand for the calculations of SMASH plus deuterons from the coalescence after burner while the lower limits, short dashed lines, are for deuterons produced directly from SMASH" .

All d-d points are even below all bands for all centrality classes. In the case of p-p, the first two centrality bins are closer to the thermal scenario, and two others to the coalescence case. Is this the main figure leading to the main paper's conclusion that deuterons are produced in the coalescence scenario? Please comment on this.

Slide 15. Figure 4: I would like more details about extracting SI parameters here. You had to fix the source size to get these parameters. How do you know you assumed them correctly? I miss the discussion about the extraction of all these parameters. f0^-1 is around -0.2 fm^-1 and -0.4 fm ^-1. How did they lay o the conclusion about bound states? Both are negative. Refer to the comment from slide 7. 

Backup slides: Please consider discussing them during the presentation.

1. Can you explain in more detail how you extracted all: R, f0, and d0?

The color-full maps seem to be inconsistent with extracted parameters shown with the correlation functions. f_0 in most backup slides is positive. 

2. Can you explain more details about Sim. Fit?

Thanks,

Hanna

Hanna Paulina Zbroszczyk

PhD DSc Eng, Professor WUT

E-mail: hanna.zbroszczyk AT pw.edu.pl

Tel: +48 22 234 5851 (office)

Address:

Warsaw University of Technology

Faculty of Physics

Nuclear Physics Division

Koszykowa 75

Office: 117b (via 115)

00-662 Warsaw, Poland

Wiadomość napisana przez K.Mi <mike1996 AT mails.ccnu.edu.cn> w dniu 14.04.2023, o godz. 09:46:

Dear Hanna,

Please find the request material through the under links

•  Paper proposal in PWG(including comments reply):

star.bnl.gov

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•  Preview draft:

star.bnl.gov

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•  Webpage:

star.bnl.gov

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Thank you.

Best regards,

Ke

On 11. Apr 2023, at 20:52, Hanna Paulina Zbroszczyk <hanna.zbroszczyk AT pw.edu.pl> wrote:

Hi Ke,

Can you prepare one file including your initial presentation: 

star.bnl.gov

And your responses as well?

star.bnl.gov

I will have some comments, but before I respond I need to see the current draft of the presentation you intend to show during preview.

Thanks,

Hanna

Hanna Paulina Zbroszczyk

PhD DSc Eng, Professor WUT

E-mail: hanna.zbroszczyk AT pw.edu.pl

Tel: +48 22 234 5851 (office)

Address:

Warsaw University of Technology

Faculty of Physics

Nuclear Physics Division

Koszykowa 75

Office: 117b (via 115)

00-662 Warsaw, Poland

Wiadomość napisana przez K.Mi <mike1996 AT mails.ccnu.edu.cn> w dniu 10.04.2023, o godz. 17:28:

Dear Convenors,

This is a gentle reminder that we would like to request the PWGC preview for the ‘Light Nuclei Femtoscopy at 3 GeV’ paper.

Here’s the related links: 

-> Paper proposal in PWG: https://drupal.star.bnl.gov/STAR/blog/kmi/20221222PaperProposalLightNucleiCF3GeV

-> Webpage: https://www.star.bnl.gov/protected/bulkcorr/kmi/paper/LightNuclei/LightNuclei_CF.html

Could you help to arrange that? And kindly let us know if Please more information is needed. 

Thank you.

Best regards, 

Ke for the PAs

On 3. Apr 2023, at 12:04, K.Mi <mike1996 AT mails.ccnu.edu.cn> wrote:

Dear Convenors,

We would like to request PWGC preview for the ‘Light Nuclei Femtoscopy at 3 GeV’ paper.

The detailed information can be found from the following links:

-> Paper proposal in PWG: https://drupal.star.bnl.gov/STAR/blog/kmi/20221222PaperProposalLightNucleiCF3GeV

-> Webpage: https://www.star.bnl.gov/protected/bulkcorr/kmi/paper/LightNuclei/LightNuclei_CF.html

Please kindly let us know if any other information is needed. Thank you.

Best regards,

Ke