STAR Correlations and Fluctuations PWG

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

Dear Hanna,

                Thank you for your careful reading and constructive comments.

Please find my revised slides and replies below.

https://drupal.star.bnl.gov/STAR/node/55684

Slide 1:  Add Supported in part by U.S. department of Energy (don’t forget about their logo)

---> done

Slide 2: Your outline is very short. I recommend to add more points that will be discussed during your talk

---> done

Slide 3: Colliding mode -> Collider mode

---> done

Slide 4: remove the line: Initial scatterings -> medium -> expanding -> particle-emitting (freeze-out)

Instead you should describe the source’s evolution by words (left plot)

---> removed

Femtoscopy (Correlation Function) -> Femtoscopy method (skip Correlation Function)

---> done

Slide 5: 1/2 -> 1 and 2 ---> done

If you don’t refer to any specific reference frame I would just define the vector q:

vec{𝑞}/Δ𝑝/Qinv =sqrt{−Δ𝑝𝑢Δ𝑝𝑢 } -> vec{q} = sqrt{−Δ𝑝𝑢Δ𝑝𝑢 }

----> "Here I referd the reference: Rev. Mod. Phys. 62, 553 (1990), and define the vector q as follows:

 Qinv =sqrt{−Δ𝑝𝑢Δ𝑝𝑢 }

q_{inv} = 0.5*Qinv， Thus I can use q_{inv} in my figures. "

Then you leave the following formula:

Δ𝑝𝑢 = 𝑝𝑢 1- 𝑝𝑢 2

Remove: vec{q}(\Dellta p) from definitions of A(\vec{q}) and B(\vec{q}) 

----> removed

Slide 6: Add that TPC means Time Projection Chamber and ToF means Time of Flight:

Particle identification: particle's energy loss: Time Projection Chamber (TPC) + particle's time of flight: Time of Flight (TOF) 

3 GeV -> sqrt{s_{NN}} = 3 GeV

---> done

Slide 7: Simulation of CF -> Proton-proton correlations

Change the description of the axises: \Delta p -> q_{inv}

C(\Delta p) -> C(q_{inv})

And add the definition of the q_inv.

----> done 

Slide 9 and 10: Here you plot your correlations functions not in \delta(p) but in q_{inv}/2, change descriptions of the axises (remember to update your preliminary plots at drupe too)

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

\delta(p) -> q{inv}/2 in the text

----> The titles of the axises were changed to be consistent with the definition in slide 5.

The preliminary plots at drupe have been updated.

Slide 11: you can keep the plots, however I think it is too early to show your predictions regarding the volume.

It is ok if you show these plots but as we discussed during the meeting, having one-dimensional correlation function you cannot extract Rx, Ry, Rz and time. In order to do it you should calculate your correlation function in 3 dimensions, or to use Spherical Harmonics decomposition of the correlation function.

Moreover, your volume’s extraction varies between 500 and 900 fm^3 which means you don’t get your precise estimation this way. Please remove the table. Instead, you can say, you will study more proton-proton system to extract information regarding the volume of the system.

----> I would keep the plots. 

Thank you for your suggestions and I agree with your opinions.

The table was removed and wrote that "The proton-source volume will be extracted from CFs and the energy dependence of volume will be studied"

Slide 12: I would skip this slide completely as the extraction of the volume parameters need more investigation.

Please remove the right plot from the preliminary page:

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

---> I removed the slide 12 and the right plot from the preliminary page.

Please let me know if you have any more comments.

Best regards,

Chuan

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

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

Date:  Sat, Jul 24, 2021 10:08 PM

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

Subject:  Re: [Star-cf-l] STAR presentation by Chuan Fu for QPT2021 submitted for review

 

Dear Chuan,

Please find below comments to your nice slides:

Slide 1:  Add Supported in part by U.S. department of Energy (don’t forget about their logo)

Slide 2: Your outline is very short. I recommend to add more points that will be discussed during your talk

Slide 3: Colliding mode -> Collider mode

Slide 4: remove the line: Initial scatterings -> medium -> expanding -> particle-emitting (freeze-out)

Instead you should describe the source’s evolution by words (left plot)

Femtoscopy (Correlation Function) -> Femtoscopy method (skip Correlation Function)

Slide 5: 1/2 -> 1 and 2

If you don’t refer to any specific reference frame I would just define the vector q:

vec{𝑞}/Δ𝑝/Qinv =sqrt{−Δ𝑝𝑢Δ𝑝𝑢 } -> vec{q} = sqrt{−Δ𝑝𝑢Δ𝑝𝑢 }

Then you leave the following formula:

Δ𝑝𝑢 = 𝑝𝑢 1- 𝑝𝑢 2

Remove: vec{q}(\Dellta p) from definitions of A(\vec{q}) and B(\vec{q})

Slide 6: Add that TPC means Time Projection Chamber and ToF means Time of Flight:

Particle identification: particle's energy loss: Time Projection Chamber (TPC) + particle's time of flight: Time of Flight (TOF) 

3 GeV -> sqrt{s_{NN}} = 3 GeV

Slide 7: Simulation of CF -> Proton-proton correlations

Change the description of the axises: \Delta p -> q_{inv}

C(\Delta p) -> C(q_{inv})

And add the definition of the q_inv.

Slide 9 and 10: Here you plot your correlations functions not in \delta(p) but in q_{inv}/2, change descriptions of the axises (remember to update your preliminary plots at drupe too)

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

\delta(p) -> q{inv}/2 in the text

Slide 11: you can keep the plots, however I think it is too early to show your predictions regarding the volume.

It is ok if you show these plots but as we discussed during the meeting, having one-dimensional correlation function you cannot extract Rx, Ry, Rz and time. In order to do it you should calculate your correlation function in 3 dimensions, or to use Spherical Harmonics decomposition of the correlation function.

Moreover, your volume’s extraction varies between 500 and 900 fm^3 which means you don’t get your precise estimation this way. Please remove the table. Instead, you can say, you will study more proton-proton system to extract information regarding the volume of the system.

Slide 12: I would skip this slide completely as the extraction of the volume parameters need more investigation.

Please remove the right plot from the preliminary page:

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

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 ChuanFu <fuchuan AT mails.ccnu.edu.cn> w dniu 24.07.2021, o godz. 04:20:

Dear Hanna,

                 Thank you for your useful information.

All data plots from my QPT slides have been added to the following link (all plots have been discussed in PWG meeting):

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

Please check it and let me know if any questions/suggestions.

Please find my latest QPT slides:

https://drupal.star.bnl.gov/STAR/node/55684

Sorry to sent the slides for QPT 2021 to PWG near the deadline (my talk, August 27).

Best regards,

Chuan

 

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

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

Date:  Fri, Jul 23, 2021 10:21 PM

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

Subject:  Re: [Star-cf-l] STAR presentation by Chuan Fu for QPT2021 submitted for review

 

Dear Chuan,

We haven’t discussed recently your plots to get preliminary labels.

Please prepare all what you would like to include and add a contribution:

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

We should discuss this item during next PWG meeting if you would like to add something new what hasn’t been shown yesterday. The rest we can comment via emails.

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 webmaster--- via Star-cf-l <star-cf-l AT lists.bnl.gov> w dniu 22.07.2021, o godz. 16:23:

Dear star-cf-l AT lists.bnl.gov members,

Chuan Fu (fuchuan AT mails.ccnu.edu.cn) has submitted a material for a review,  
please have a look:
https://drupal.star.bnl.gov/STAR/node/55684

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