STAR Correlations and Fluctuations PWG

["ChuanFu" <fuchuan AT mails.ccnu.edu.cn>]

Dear ShinIchi,

                  Thank you.

We will consider these checks.

Thanks,

Chuan

 

 

------------------ Original ------------------

From:  "ShinIchi Esumi"<esumi.shinichi.gn AT u.tsukuba.ac.jp>;

Date:  Fri, Jun 16, 2023 04:41 PM

To:  "Star-cf"<star-cf-l AT lists.bnl.gov>;

Cc:  "ChuanFu"<fuchuan AT mails.ccnu.edu.cn>; "秦智"<qinz18 AT mails.tsinghua.edu.cn>;

Subject:  Re: [Star-cf-l] CF PWG meeting, June 15th, 2023, time: 9:00 (BNL time)

 

Dear Chuan (and Zhi)

I see, the analysis with pion pair is mostly done in 3D, so it might be

difficult to find the 1D results in the same reference frame, but there

should be some. But, I can not find it on top of my head, sorry...

As Hanna might have been mentioning during the PWG yesterday,

I would like to see the independent fitting of 9 bins (3 centrality x 3

rapidity bins) to extract all 3 parameters (rG, f0, d0) as a function of

these bins first, in stead of assuming centrality and rapidity dependence

only on rG, which is also quite reasonable, so the comparison would be

meaningful between simultaneous and independent fittings.

Since rapidity dependence of rG is minor compared to your centrality

dependence (according to your fitting), and we already know there are

significant kT (or pT) dependencies observed in all other HBT analysis,

so it would be informative for us to try a similar 9 bins analysis (3 centrality

x 3 kT bins) and try to extract the 3 parameters in both simultaneous and

independent fittings.

Concerning on the kT dependence, there has been a very clear mT

dependence on radius parameters including various different mass

particles like pi, K and proton, but for your case, you do have an additional

number of strangeness, among proton, lambda(L), cascade (Xi) for p-p,

p-L, p-Xi correlations, so that you could try some other (s-number) scalings

in addition to the mT- (mass-) scaling on rG, but there might be some

hidden scaling even for d0 and f0 parameters, therefore I would first

like to see the independent fitting to see all the possible dependences

on all the 3 parameters, including other particle-pair system correlations.

Since we do expect the volume dependence from centrality, the baryon

density dependence from rapidity, and the radial-expansion (with locally

thermalized area) dependence from kT, we might see something more

interesting with your new set of results...

I would also like to remind you about possible merging and/or splitting

effects in close pairs between primary proton and daughter proton (or pion)

from lambda decay in your p-L study, which might be seen as a difference

in some phase space between real and mixed pairs distributions (similar

to the shared daughter cuts for L-L case). As you also say there is serious

track-merging effects at low pT. So if you have done such study, I would

like to see the results of such tests, if you need such pair cuts for this

analysis or not.

Thank you very much again for the interesting results. But I’m not really

sure I’m answering your E-mail or not… Sorry about it.

Best regards, ShinIchi

2023/06/15 23:40、ChuanFu <fuchuan AT mails.ccnu.edu.cn>のメール:

Dear Esumi,

               It is very nice to find the paper about the 1D pion CF and the corresponding rG.

Because when we compare the Ro Rs and Rl of pion, it is from LCMS frame, and also it is from the 3D CF,

but for p-p source szie rG, it is from Pair Rest Frame, and it is from 1D CF.

Considering the different production mechanism for baryons and mesons, and their mass are much different,

and the medium expansion and flow have a different effect on baryons and mesons,

I don't think we can get effective conclusion from the kT dependence of meson and baryon CFs.

I very want to know people how to discuss the kT dependence of meson and baryon CFs,

and I am very grateful if you can send the relevant paper to me.

In addition, the lowest pT is 0.4 GeV/c (the corresponding lowest kT ~ 0.5 GeV/c) in 3 GeV p-p CF measurement

since there are very serious track-merging effects in pT < 0.4 GeV/c.

For 3 GeV pion-pion CF measurement, the highest kT ~ 0.6 GeV/c, so it is difficult to compare the kT dependence of meson and baryon CFs.

Thanks,

Chuan

 

 

------------------ Original ------------------

From:  "ChuanFu"<fuchuan AT mails.ccnu.edu.cn>;

Date:  Thu, Jun 15, 2023 09:49 PM

To:  "Star-cf"<star-cf-l AT lists.bnl.gov>; "ShinIchi Esumi"<esumi.shinichi.gn AT u.tsukuba.ac.jp>;

Subject:  Re:[Star-cf-l] CF PWG meeting, June 15th, 2023, time: 9:00 (BNL time)

 

Dear Esumi,

                As you suggest us to compare the CF from different kT range,

could you please send us to the papers about the kT dependence of the meson CF,

and the papers about the kT dependence of meson CF and baryon CF?

 I want to learn the physics about the kT dependence of meson CF and baryon CF.

Thanks,

Chuan

 

 

------------------ Original ------------------

From:  "Star-cf"<star-cf-l AT lists.bnl.gov>;

Date:  Tue, Jun 13, 2023 05:25 AM

To:  "Star-cf"<star-cf-l AT lists.bnl.gov>;

Subject:  [Star-cf-l] CF PWG meeting, June 15th, 2023, time: 9:00 (BNL time)

 

Dear CF Activists,

We will have our weekly CF PWG meeting on Thursday, June 15th, 9:00 AM 
(BNL time).

If you would like to contribute, please let us know.

We have already one contribution from Zhi.

Please try to post your slides at your earliest convenient.
We will connect via Zoom. Please find the connection details under the
meeting webpage.

Thank you,
Best regards,
Toshihiro and Hanna

https://drupal.star.bnl.gov/STAR/blog/luoxf/correlations-and-fluctuations
https://drupal.star.bnl.gov/STAR/blog/gos/correlations-and-fluctuations-preliminary-plots 

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