STAR Flow, Chirality and Vorticity PWG

[Prithwish Tribedy <ptribedy AT rcf.rhic.bnl.gov>]

Hello Yicheng,
  Here are my comments to you nice slides -- with these included I sign 
off your talk.

General: I would avoid terminologies that are intrinsic to STAR 
collaboration such as "StRefMultCorr" etc.

slide#3: "detected by TOF" --> "using TOF+TPC"
slide#4: "topologic" --> "topological"
slide#6: "is still mixed by the signal and background" --> "contains a 
mixture of signal and background"
slide#7: "can calculte" --> "can be used to get"
slide#7: It is not clear what you mean by "and k ≠ 1 cases from 
R^{sub}_{n1}[2]."

slide#8:
"To make connection from our observed ∆N^{obs} to true Λ (Λ¯) 
handedness, detector effects and decay angular distribution need to be 
considered."
-->
"To make connection from the observed to the true Λ (Λ¯) handedness, 
detector effects and decay angular distribution need to be considered. 
In this exploratory study we will only consider the observed difference 
between the number of left and right handed 
Lambdas(Anti-Lambdas)=∆N^{obs}"

slide#9:
"∆N event average" --> "∆N^{obs} event average"

slide#9:
I think you should revise the bullets and add the simple equation that 
you use to correct for background (the one you showed in the backup 
slides during PWG meeting). I believe this will bring more clarity and 
save you time.

slide#9:
"uncertainties largely correlated, and canceled on signal"
-->
"uncertainties are correlated and largely cancel for signal"

slide#10:
"should not produce physics correlations"
-->
"should not affect the physics correlations between ∆N^{obs} and Δa_1"

slide#10:
I don't think you can refer to a bulkcorr talk here. Remove the link and 
say "Cartoon: Joseph Adams, Quark Matter 2019". Also crop the figure to 
remove the lower part where it says "bulkcorr meeting"

slide#11 and Eq.5:
Note that you already defined "Δa_1" on slide#2, make sure this equation 
does not lead to confusion. Unfortunately, I have no better suggestion 
on this.

slide#12 & 13:
"The signal is consistent with zero" --> "The signal is consistent with 
zero within the current uncertainties"


Best,
Prithwish





On 2020-10-19 16:30, Yicheng Feng via Star-fcv-l wrote:
> Hi ShinIchi,
>
> Thank you for your comments.
>
> For the ~2sigma deviation in 50-60%,
> I think I can mention this in the talk, as it is.
> For safety, I prefer not to draw any conclusion from this single
> datapoint.
>
> For the DN vs. a1+ and a1- separately,
> I don't have the results for now, but I submitted jobs in RCF to get
> this information.
> Hopefully, I could give an update in the coming PWG meeting this
> Wednesday.
>
> For your question "_Nobody have ever looked this in 200GeV AuAu,
> yet?_",
> For now, this analysis is only conducted in Run18AuAu27GeV.
> At 200 GeV the polarization is smaller so it may be difficult.
> But it doesn't hurt to look at 200 GeV data as well.
>
> As instructed by you, I made a blog for my preliminary summary:
> https://drupal.star.bnl.gov/STAR/blog/fengyich/dnp2020-preliminary-plots-ebye-corr-btw-lam-handedness-and-cme-run18auau27gev
>
> including the slides and all the STAR preliminary plots (.jpg and
> .png).
>
> I also updated the slides
> (EbyeCorrLamPolCME_DNP2020talk_YichengFeng_v3.pdf [1]) to
> https://drupal.star.bnl.gov/STAR/node/52374
>
> There are only three small changes:
> (1) backup removed,
> (2) "Run18, Au+Au, \sqrt{s_{NN}}=27GeV" added to all preliminary
> plots,
> (3) The sequence in Eq.5 is rearranged (the first equal sign moved to
> the third).
>
> Sincerely,
> Yicheng
>
> -------------------------
>
> From: Star-fcv-l <star-fcv-l-bounces AT lists.bnl.gov> on behalf of
> ShinIchi Esumi via Star-fcv-l <star-fcv-l AT lists.bnl.gov>
> Sent: Saturday, October 17, 2020 11:07 PM
> To: STAR Flow, Chirality and Vorticity PWG <star-fcv-l AT lists.bnl.gov>
> Subject: Re: [Star-fcv-l] STAR presentation by Yicheng Feng for DNP
> 2020 submitted for review
>
> Dear Yicheng
>
> After you prepare the preliminary summary page with all your
> preliminary plots to be linked
> at special drupal area for the preliminary location with necessary
> information at :
> https://drupal.star.bnl.gov/STAR/pwg/bulk-correlations/bulkcorr-preliminary-summary
>
> then I would approve your talk.
> Best regards, ShinIchi
>
> > On Oct 18, 2020, at 11:50, ShinIchi Esumi via Star-fcv-l
> > <star-fcv-l AT lists.bnl.gov> wrote:
> >
> > Dear Yicheng
> > I would sign off your nice talk with a few comments.
> >
> > You have chosen to say no signal for both 10-50% and 0-80%,
> > which we all agree, but I would say there is one “2-sigma”
> > signal
> > deviation point at 50-60%...
> >
> > For your future PWG presentation, could you also please show
> > us just with Lambda (or anti-Lambda) as well as just with a+ (or
> > a-) in stead of Delta_a (a+ and a- combined), the signal could
> > be there in any of these covariances.
> >
> > Nobody have ever looked this in 200GeV AuAu, yet?
> > Best regards, ShinIchi
> >
> > > On Oct 15, 2020, at 9:45, webmaster--- via Star-fcv-l
> > > <star-fcv-l AT lists.bnl.gov> wrote:
> > >
> > > Dear star-fcv-l AT lists.bnl.gov members,
> > >
> > > Yicheng Feng (feng216 AT purdue.edu) has submitted a material for a
> > > review,
> > > please have a look:
> > > https://drupal.star.bnl.gov/STAR/node/52374
> > >
> > > ---
> > > If you have any problems with the review process, please contact
> > > webmaster AT www.star.bnl.gov
> > > _______________________________________________
> > > Star-fcv-l mailing list
> > > Star-fcv-l AT lists.bnl.gov
> > > https://lists.bnl.gov/mailman/listinfo/star-fcv-l
> >
> > _______________________________________________
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>
>
>
> Links:
> ------
> [1] 
> https://drupal.star.bnl.gov/STAR/system/files/EbyeCorrLamPolCME_DNP2020talk_YichengFeng_v3_0.pdf
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