STAR Flow, Chirality and Vorticity PWG

[ShinIchi Esumi <esumi.shinichi.gn AT u.tsukuba.ac.jp>]

Dear Jagbir

The followings are our E-mail exchanges about a year ago, do you still remember? 

I’m still waiting for your full answer. You’ve shown us the resolutions (cos and sin 

correlations) between Psi_Db and Psi_Ep angles, which do strongly depend on 

the Db_max selection, which is a kind proof of your method that is sensitive to CME, 

I’m still trying to see how your Db_asy selection is helping in addition to this. 

Thanks again for the update last week and hoping to see your future updates. 

Best regards, ShinIchi

https://drupal.star.bnl.gov/STAR/system/files/BulkCorr_PWG_09-10-2019_Jagbir.pdf

PS : What I would like to see is the both top and bottom plots like p6 and p7 in the 

slide above, but with superimposing many events after rotating the phi_Db to be zero 

at Db_max. Please make them for several Db_max selections. I would guess you are 

already applying your Db_asy selection for these events, so I would like to see them 

with or without Db_asy selection. 

From: ShinIchi Esumi via Star-bulkcorr-l <star-bulkcorr-l AT lists.bnl.gov>

Subject: Re: [Star-bulkcorr-l] QM2019 Poster : Jagbir Singh

Date: November 1, 2019 12:41:51 JST

To: jagbir <jagbir AT rcf.rhic.bnl.gov>, star-bulkcorr-l <star-bulkcorr-l AT lists.bnl.gov>

Reply-To: ShinIchi Esumi <esumi.shinichi.gn AT u.tsukuba.ac.jp>, star-bulkcorr-l AT lists.bnl.gov

Dear Jagbir

Can you do a few more systematic checks as in the followings (maybe after QM)?
1). Db_max selection 0-10% or 0-30% to compare with the current 0-20% for the mid-central data.
2). |Db_asy| cut to 0.15 or 0.35 to compare with the current 0.25. 
3). Db window size to 60 deg or 120 deg to compare with the current 90 deg. 
4). In terms of charge re-shuffling, can you make the <cos>, <sin> resolution plots or make the 3 plots 
    (Db_asy, Db+- and N vs Psi_Db) for the same event, although I prefer to overlay many events after 
    rotating the events by Psi_Db) before and after re-shuffling? 
5). With AMPT data without signal, I would also like to see the same as above 4).

Best regards, ShinIchi

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

Subject: Re: [Star-bulkcorr-l] Bulk/Corr PWG 9/Oct (Wed) 9:30AM(EST)- QM19 talk/poster reviews

Date: October 10, 2019 3:07:18 JST

To: jagbir <jagbir AT rcf.rhic.bnl.gov>, star-bulkcorr-l AT lists.bnl.gov

Dear Jagbir
The page 6 and 7 top panels were the plots that I meant as (1) in my last E-mail. 
Please expand the vertical axis of the lower panels in the page 6 and 7, so that 
we do see the full shape of the Db_asy vs phi, which I meant as (2). In page 5, 
you are trying to see the correlation between Db+- and Db_asy values, but what I 
would like to see is the angular correlation between Db+- and Db_asy shape, so 
the 1D shape comparison between top and bottom panels in page 6 and 7 is very 
good. I would also like you to calculate "N vs phi” and/or “Sum{pT} vs phi” for the 
same event and to compare with the top and bottom panels in page 6 and 7, where 
I expect the v2-like cos(2x) distribution, since we know v2 increases with pT, so 
"Sum{pT}” in stead of “N” is just to enhance the v2 effect. I hope to see some 
agreement in peak phase in azimuthal angle between these panels, since they 
are from the same event, if Psi_DB catches the true plane. I do think we might 
already be seeing some coincidence of the azimuthal phase between top and 
bottom panels in page 6 and 7, but please expand the vertical scale of the lower 
panel, so that we can see the full shape of Db_asy vs phi, in addition to the v2 shape 
from the event plane with the two additional figures I mentioned above. If possoble, 
I would like to see several different event examples, not just one event for one 
centrality bin. 

I’ve asked you to show the <cos, sin> values, so thank you very much for the page 
13 and the observed trend is something we could expect, right? In order to fully 
understand the correlation, could you please also show me the correlation between 
angles Psi_DB and Psi_EP, which is just the 2-D angular correlation "Psi_DB vs Psi_EP” 
for several different centrality and/or Db+-max selections (with/without including |Db_asy| 
cuts)? Do we see a kind of auto-correlation between Psi_DB and Psi_EP?, so will you 
also be able to define Psi_DB and Psi_EP from the two different independent eta regions, 
for example, one at negative eta and another one at positive eta with some eta-gap cuts 
etc, like what we usually do the flow/correlation analysis with 2 sub-events. Thank you 
very much for your interesting studies and sorry for asking more and more questions 
and requests. I hope you also agree to see these plots. Thanks again. 
Best regards, ShinIchi

Dear Jagbir
Thanks for the interesting analysis and results. I would like to see the followings. 
1) event-by-event Db+- distribution as a function of phi, which you use to get Db+-max value in each event
2) event-by-event Db_asy distribution as a function of phi, and its relation to the Db+-max value, and/or 
  Db+-max distribution with different |Db_asy| selection
3) Db+-max value is determined in each event, which has a specific phi direction (the largest charge 
  asymmetry axis direction), let’s call as Psi_Db, that we hope this to be perpendicular to the reaction 
  plane, if this is sensitive to the CME, so we would like to see the direct correlation with the reconstructed 
  event plane Psi_EP possibly with various cuts on Db+-max and/or Db_asy selections, for example; 
  <cos(2*(Psi_Db-Psi_EP-pi/2))> and its <sin()> etc as a function of centrality and as a function of 
  Db+-max value etc. 
Best regards, ShinIchi

On Oct 9, 2019, at 22:46, jagbir via Star-bulkcorr-l <star-bulkcorr-l AT lists.bnl.gov> wrote:

Dear Shinichi and all,

Please find the slides for today's meeting here:
https://drupal.star.bnl.gov/STAR/system/files/BulkCorr_PWG_09-10-2019_Jagbir.pdf

Thanks and regards,
jagbir singh
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Star-bulkcorr-l AT lists.bnl.gov
https://lists.bnl.gov/mailman/listinfo/star-bulkcorr-l

Begin forwarded message:

From: ShinIchi Esumi via Star-bulkcorr-l <star-bulkcorr-l AT lists.bnl.gov>

Subject: Re: [Star-bulkcorr-l] Bulk/Corr PWG 25/Sep (Wed) 9:30AM(EST)-

Date: September 27, 2019 1:03:50 JST

To: jagbir <jagbir AT rcf.rhic.bnl.gov>

Cc: star-bulkcorr-l AT lists.bnl.gov

Reply-To: ShinIchi Esumi <esumi.shinichi.gn AT u.tsukuba.ac.jp>, star-bulkcorr-l AT lists.bnl.gov

Dear Jagbir

Thanks for the interesting analysis and results. I would like to see the followings.

1) event-by-event Db+- distribution as a function of phi, which you use to get Db+-max value in each event
2) event-by-event Db_asy distribution as a function of phi, and its relation to the Db+-max value, and/or
   Db+-max distribution with different |Db_asy| selection
3) Db+-max value is determined in each event, which has a specific phi direction (the largest charge
   asymmetry axis direction), let’s call as Psi_Db, that we hope this to be perpendicular to the reaction
   plane, if this is sensitive to the CME, so we would like to see the direct correlation with the reconstructed
   event plane Psi_EP possibly with various cuts on Db+-max and/or Db_asy selections, for example;
   <cos(2*(Psi_Db-Psi_EP-pi/2))> and its <sin()> etc as a function of centrality and as a function of
   Db+-max value etc.

Best regards, ShinIchi

On Sep 26, 2019, at 23:27, jagbir <jagbir AT rcf.rhic.bnl.gov> wrote:

Dear Shinichi and all,

It will be very nice of you if you can send me the specific comments for yesterday's BulkCorr PWG meeting, So that we can work on it.

Thanks and Regards,
Jagbir Singh

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