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Re: [[Star-cf-l] ] Notes for PWGC preview (07/19/2024): Measurements of Proton−Proton, Proton−Λ and Proton−Ξ- Correlation Functions in sqrt{sNN} = 3 GeV Au+Au Collisions at RHIC

From: Hanna Zbroszczyk <hanna.zbroszczyk AT pw.edu.pl>
To: "star-cf-l AT lists.bnl.gov" <star-cf-l AT lists.bnl.gov>
Subject: Re: [[Star-cf-l] ] Notes for PWGC preview (07/19/2024): Measurements of Proton−Proton, Proton−Λ and Proton−Ξ- Correlation Functions in sqrt{sNN} = 3 GeV Au+Au Collisions at RHIC
Date: Sun, 17 Nov 2024 18:07:25 +0100

Dear Chuan,

I have couple of questions before we move forward, they should be addressed in the paper:

1. Could you please provide me with the link to the website where all the following documents are uploaded: the paper draft, supplemental material, analysis note, and responses to PWGC?

2. The paper should include more detailed discussions regarding the proton-cascade parameter (FSI). You mentioned that dd0 is fixed to 5.95 fm (please provide a reference), and you list f0 as 0.53 +/- 1.21 fm, but Figure 3 does not represent this system. Additionally, I don’t see a clear justification for presenting Figures 3 and 4b separately. Since PRL has strict length limitations, combining these into one comprehensive figure could free up space for further discussion.

3. What is the source size from the proton-cascade? This critical aspect seems to be missing from the paper and should be addressed. Possible correlations between source and interaction parameters should be discussed as well.

4. Furthermore, following the most recent discussions from WPCF in Toulouse, none of the analyses seem to discuss the impact of the third-body effect on the measured correlation function. Given the energy domain of this study, such effects are expected to play a role. Have you evaluated their influence?

5. Which FSI parameters were used for calculating UrQMD correlation functions? What about proton-cascade from UrQMD?

Thanks,

Hanna

prof. dr hab. inż. Hanna Zbroszczyk
E-mail: hanna.zbroszczyk AT pw.edu.pl
Tel: +48 22 234 5851 (biuro)

Adres:
Poltechnika Warszawska

Wydział Fizyki
Zakład Fizyki Jądrowej
ul. Koszykowa 75
Biuro: 117b (via 115)
00-662 Warszawa

Wiadomość napisana przez 傅川 <fuchuan AT impcas.ac.cn> w dniu 15.10.2024, o godz. 15:36:

Dear Hanna,
         We would request GPC about the paper
"Measurements of Proton−Proton, Proton−Λ and Proton−Ξ- Correlation Functions in sqrt{sNN} = 3 GeV Au+Au Collisions at RHIC"
Please kindly find the following document:
1) Paper draft:
https://drupal.star.bnl.gov/STAR/system/files/3GeV_pp_pL_pXi_CF_PaperDraft_v1.pdf
2) Supplemental materials:
https://drupal.star.bnl.gov/STAR/system/files/Supplemental_materials_v1.pdf
3) Analysis note:
https://drupal.star.bnl.gov/STAR/system/files/Analysis_note_3GeV_pp_pL_pXi_CF_v1.pdf
4) Response to PWGC preview:
https://drupal.star.bnl.gov/STAR/system/files/PWGC-response_0.pdf

Please let us know if you have any comments and suggestions.

Best and regards,
Chuan for the PAs

> -----原始邮件-----
> 发件人: 傅川 <fuchuan AT impcas.ac.cn>
> 发送时间: 2024-10-01 23:11:01 (星期二)
> 收件人: star-cf-l AT lists.bnl.gov
> 抄送: "Hanna Paulina Zbroszczyk" <hanna.zbroszczyk AT pw.edu.pl>, nxu <nxu AT lbl.gov>
> 主题: Re: [[Star-cf-l] ] Notes for PWGC preview (07/19/2024): Measurements of Proton−Proton, Proton−Λ and Proton−Ξ- Correlation Functions in sqrt{sNN} = 3 GeV Au+Au Collisions at RHIC
>
> Dear Convenors and All,
>
>            The following documents are ready for PWG review and please find them below:
> Paper website:
> https://drupal.star.bnl.gov/STAR/blog/fuchuan/Baryon-Baryon-CF-3GeV-0
>
> 1) Paper draft:
> https://drupal.star.bnl.gov/STAR/system/files/3GeV_pp_pL_pXi_CF_PaperDraft_v1.pdf
> 2) Supplemental materials:
> https://drupal.star.bnl.gov/STAR/system/files/Supplemental_materials_v1.pdf
> 3) Analysis note:
> https://drupal.star.bnl.gov/STAR/system/files/Analysis_note_3GeV_pp_pL_pXi_CF_v1.pdf
> 4) Response to PWGC preview:
> https://drupal.star.bnl.gov/STAR/system/files/PWGC-response_0.pdf
>
> Your comments/suggestions are helpful for us and,
> we would appreciate if you could take a look at those documents.
>
> Thank you and best regards,
> Chuan, Zhi and Yingjie for the PAs
>
> -----原始邮件-----
> 发件人:"Sooraj Radhakrishnan" <skradhakrishnan AT lbl.gov>
> 发送时间:2024-07-23 02:40:31 (星期二)
> 收件人: "STAR Papers Discussion List" <starpapers-l AT lists.bnl.gov>, "STAR Correlations and Fluctuations PWG" <star-cf-l AT lists.bnl.gov>
> 抄送:
> 主题: [[Star-cf-l] ] Notes for PWGC preview (07/19/2024): Measurements of Proton−Proton, Proton−Λ and Proton−Ξ- Correlation Functions in sqrt{sNN} = 3 GeV Au+Au Collisions at RHIC
>
> Date: 07/19/2024
>
> Participants: Chuan Fu, Ke Mi. Yingjie Zhou, Youquan Qi,Zhi, Qin, Jae Nam, Hanna Zbroszczyk,Prithwish Tribedy, Subhash Singha, Isaac Mooney, Nihar Sahoo,Yi Yang, Shuai Yang, Yue Hang Leung, ShinIchi Esumi, Sooraj Radhakrishnan
>
> Title: Measurements of Proton−Proton, Proton−Λ and Proton−Ξ- Correlation Functions in sqrt{sNN} = 3 GeV Au+Au Collisions at RHIC
> PAs: X. Dong, C. Fu, X.F. Luo, K. Mi, Z. Qin, Y.Q. Qi, S.S. Shi, Y.P. Wang, N. Xu, Z.G. Xiao, Y.J. Zhou
> Target journal: PRL
> Proposal page: https://drupal.star.bnl.gov/STAR/blog/fuchuan/Baryon-CF-paper-3-GeV
> Presentation: https://drupal.star.bnl.gov/STAR/system/files/Measurements_pp_pLam_pXi_CF_PWGC_2024_v1.pdf
>
> The PWGC panel previewed a paper proposal from CFPWG. The panel found that the analysis is mature and results are important and interesting, and the paper should move forward. The journal choice was also found to be appropriate. The following points were discussed.
>
> Q: On S.8, what are the correlation functions used for the evaluation of feed down contributions?
> A: For p - Lambda correlations, these are using p - Sigma correlations from model calculations (S.26)
>
> Q: Is there a model uncertainty in evaluation of feed-down contribution? Do you use more than one model?
> A: For p+p, the contribution is very small. For p - Lambda we use different models. For the feed-down fractions we use values from thermal model and UrQMD
>
> Q: What are the feed-down fraction for protons and Lambda at 3 GeV?
> A: This is shown on S.26, for Lambda the feedodown fraction is 30%
>
> Q: For p - Lambda, the UrQMD has much different radius than in data. But in Fig.2, the correlation function from UrQMD is very close to that in data. Why is this so?
> A: There is difference between L-L fit and UrQMD in Fig.2. The data - UrQMD difference can also be seen on S.29
>
> Q: On S.8, what are a and b for the merged pair rejection?
> A: These are cuts in Delta phi and Delta ets. The values of a and b are different for different analyses. More details can be found in S.19. These are varied for systematic uncertainty evaluation
>
> Q: On S.12, do you have the chi2 for these fits?
> A: The chi2/ndf are shown on S.23. It is around 3.
> Q: Isn't this large?
> A: The contour of variation corresponds to the contour plots in Fig.3. The quoted fit parameters have the minimum chi2/ndf
>
> Q: On Fig.1, the acceptances are slightly different for p-p and p-Lambda, and also different for p-Cascade. Does this make an impact on extracted values?
> A: For p-p, we change the minimum pT cut from 0.4 GeV/c to 0.5 GeV/c. The difference in correlation functions are very small. For p-Cascade, we have to use the acceptance because of limited statistics
>
> Q: The momentum smearing correction is listed as largest contributor to systematic uncertainties. How is this evaluated?
> A: We smear the data with the momentum resolution from embedding and evaluate the impact. This is discussed on S.20
>
> Q: Are there any constraints on f0 or d0 when doing L-L fits?
> A: No, there are no constraints?
> Q: Are the extracted f0 and d0 for p-Lambda consistent with that shown in QM preliminary?
> A: Yes, the values and errors are consistent
>
> C: The extracted f0, d0 values, particularly for p-p are very precise. This can be highlighted in the abstract
> A: Yes, we will consider
>
> Q: We have measurements of other nucleon-nucleon and nucleon-hyperon correlations. Why are they not discussed in this paper?
> A: These measurements are not published and its not clear which analyses will be published first
>
> Q: In Fig.4, is the one labelled PRC from measurement?
> A: Yes, this is from low energy scattering measurement
> C: In that case, would be good to label clearly
> A: Yes, will change
>
> Q: Does ALICE have measurements of p-p, p-Lambda?
> A: No. These are the first measurements
>
> Q: In the abstract it is mentioned that the measurements can constrain the interactions in neutron stars, but the densities are very different. How do you address this? Should this be in the abstract?
> A: The measurements can still offer constraints to model calculations. We think it is good to have in the abstract
>
> Q: Can we compare to previous measurements of proton - Omega and Lambda - Lambda correlations in Figure 4?
> A: We want to focus on the high precision measurements from this analysis on Fig.4
>
> --
> 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
>
>
> </star-cf-l AT lists.bnl.gov></starpapers-l AT lists.bnl.gov></skradhakrishnan AT lbl.gov>
</nxu AT lbl.gov></hanna.zbroszczyk AT pw.edu.pl></fuchuan AT impcas.ac.cn>

Re: [[Star-cf-l] ] Notes for PWGC preview (07/19/2024): Measurements of Proton−Proton, Proton−Λ and Proton−Ξ- Correlation Functions in sqrt{sNN} = 3 GeV Au+Au Collisions at RHIC, Hanna Zbroszczyk, 11/17/2024
- <Possible follow-up(s)>
- Re: [[Star-cf-l] ] Notes for PWGC preview (07/19/2024): Measurements of Proton−Proton, Proton−Λ and Proton−Ξ- Correlation Functions in sqrt{sNN} = 3 GeV Au+Au Collisions at RHIC, ChuanFu, 11/29/2024
  - Re: [[Star-cf-l] ] Notes for PWGC preview (07/19/2024): Measurements of Proton−Proton, Proton−Λ and Proton−Ξ- Correlation Functions in sqrt{sNN} = 3 GeV Au+Au Collisions at RHIC, EsumiShinIchi, 11/29/2024
    - Re: [[Star-cf-l] ] Notes for PWGC preview (07/19/2024): Measurements of Proton−Proton, Proton−Λ and Proton−Ξ- Correlation Functions in sqrt{sNN} = 3 GeV Au+Au Collisions at RHIC, ChuanFu, 11/29/2024
  - Re: [[Star-cf-l] ] Notes for PWGC preview (07/19/2024): Measurements of Proton−Proton, Proton−Λ and Proton−Ξ- Correlation Functions in sqrt{sNN} = 3 GeV Au+Au Collisions at RHIC, Hanna Zbroszczyk, 11/29/2024