STAR Flow, Chirality and Vorticity PWG

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

Dear Jagbir

I agree with both Prithwish and Jiangyong. But as I see a message from 

Madan attached below at the bottom of this E-mail, there seems to be 

some new updates, that we would need to see/understand your new results 

discussed in the PWG for us to approve your abstract, if you like to promise 

anything new since your last QM poster. But if you do not promise, we could 

approve before hand as Prithwish also says. I’m looking for “your” answer... 

Best regards, ShinIchi

On Sep 22, 2020, at 0:44, Prithwish Tribedy <ptribedy AT rcf.rhic.bnl.gov> wrote:

Dear All,
I see that the abstract Jagbir has submitted for IS2021 does not promise more that what has been presented at the last QM2019:
https://drupal.star.bnl.gov/STAR/system/files/QM_Poster_Jagbir_v7.pdf
I really see no real show-stopper here. The only new thing he is promising is the AVDF results but that is model.

Best,
Prithwish


On 2020-09-21 10:39, Tang, Aihong via Star-bulkcorr-l wrote:

Hi, Schinichi :
I assume that Jiangyong asking me and Evan together is to seek
opinions from the CME focus group. I am simply saying that for me I am
not in a position to say anything on behalf of the CME focus group,
because this particular analysis has not been discussed in the CME
focus group, as far as I know.
How the talks are handled/approved is not our call.
Thanks,
Aihong

On Sep 21, 2020, at 10:25 AM, ShinIchi Esumi <esumi.shinichi.gn AT u.tsukuba.ac.jp> wrote:
Dear Aihong and Jiangyong
Jagbir has indeed discussed several times before the last QM19 and
has some approved preliminary results already at the time, and later
he has presented once in the PWG (I guess also once in the cme focus
meeting) in this year, therefore I was waiting for the next one from him,
as I’ve also mentioned in the E-mail this morning.
Best regards, ShinIchi

On Sep 21, 2020, at 22:26, Tang, Aihong via Star-bulkcorr-l <star-bulkcorr-l AT lists.bnl.gov> wrote:
Hi, Jiangyong :
I cannot make comments without this being discussed in CME focus group first.  As far as I can tell, this has not happened yet. Note that other CME analyses have been through lengthy and intense checkings/debates on their sensitivity and applicability, and I would expect similar level of scrutiny applied on all CME analyses.
Thanks,
Aihong

On Sep 21, 2020, at 8:11 AM, Jiangyong Jia via Star-bulkcorr-l <star-bulkcorr-l AT lists.bnl.gov> wrote:
Hi, Jagbir,
I would suggest Aihong and Evan to also comment on your abstract. I only
have a few minor comments
1 mention STAR in the title
2 mention why your measurement is interesting for initial stages, what
we can learn about the initial state.
3 what is the main results from your study and what we learn in
comparison to traditional gamma correlators?
cheers,
Jiangyong
On 9/20/20 12:53 PM, webmaster--- via Star-bulkcorr-l wrote:

Dear Star-bulkcorr-l AT lists.bnl.gov members,
Jagbir Singh (jagbir1593 AT gmail.com) has submitted a material for a review,
please have a look:
https://drupal.star.bnl.gov/STAR/node/52159
---
If you have any problems with the review process, please contact
webmaster AT www.star.bnl.gov
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From: aggarwal <aggarwal AT pu.ac.in>

Subject: Re: STAR presentation by Jagbir Singh for Initial Stages 2021 submitted for reviewRe:

Date: September 23, 2020 1:51:35 JST

To: esumi.shinichi.gn AT u.tsukuba.ac.jp, jiangyong.jia AT stonybrook.edu, aihong AT bnl.gov, ptribedy AT rcf.rhic.bnl.gov

Cc: star-bulkcorr-l AT lists.bnl.gov, jagbir1593 AT gmail.com, aggarwal AT pu.ac.in

   Dear All,

   Thanks a lot for your comments and suggestions. Replies to some of your
   comments are given below:

   Prerequisite conditions for CME  are i) formation  of deconfined state of
   matter and ii) external magnetic field in heavy-ion collision. Both these
   conditions are related  to initial stages.

   Traditional gamma correlators are calculated for a given collision centrality
   and results are compared with models. Event shaped engineering results showed
   these gamma correlators are elliptic flow dependent. As the CME signal is
   expected to be very small and also background is very large, we felt that
   CME like signal needs to be magified as much as possible by selecting potential
   events which result large  CME like signal. So, we developed a Sliding Dumbbell
   Method(SDM) which searches back-to-back event-by-event charge separation. It is
   worth mentioning that in each colision centrality say  top  10% events with
   highest back-to-back charge separation gamma correlators increase by a factor
   of 5-10 as compared to their values for a  given collision centrality. It is
   possible to select a sample of events giving rise to large CME like signal.

   Follwing changes have been made after the QM2019:

   1. Now we have taken into account the correlated background in calculating
   fcme which was not there in QM2019.
   This background is calculated by restoring the charges of particles in
   charge reshuffle events and again calculated delta gamma to add it to
   charge reshuffle background which not only killed CME like correlations
   but also correlations present amongst particles.
   2. An attempt has been made to further magnify the observed correlations
   considering the correlations in each event amongst particles inside the
   dumbbell only.
   3. In SDM, CME like signal is already magnified by a factor of ~5-10
   for top 10% events in each centrality.
   4. Considering correlations amongst particles inside the dumbbell only
   CME like  signal is further magnified by a factor of ~5-8.
   5. Further event-by-event  charge separation obtained by SMD is directly
   proportional to sqaure root of correlator for top 10% events in each collision
   centrality.
   6. SDM is test  on AVDF. So, results of AVFD with SDM will also be presented.

   In veiw of above, please let us know your expert decision.

  Thanking you,

   Madan Aggarwal

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