STAR Flow, Chirality and Vorticity PWG

["Wang, Fuqiang" <fqwang AT purdue.edu>]

Hi Prithwish, All,

I wouldn't include <pT> and <TOFMatch>. The <pT> is too physics specific. 
<TOFMatch> is useful for pileup rejection but seems too excessive at the 
general QA level.

I wouldn't include any in list B) as FCV-wide QA variables. I think these 
should be analysis specific.

I understand the rationale behind a more formal collaboration-wide QA and it 
has merits. But it may also have the unwanted consequences that 1) one size 
doesn't fit all, and 2) analyzers may become too relying on general QA and 
neglecting needed analysis-specific QA.

Best regards,
Fuqiang



> -----Original Message-----
> From: Star-fcv-l <star-fcv-l-bounces AT lists.bnl.gov> On Behalf Of Prithwish
> Tribedy via Star-fcv-l
> Sent: Thursday, October 21, 2021 12:18 PM
> To: STAR Flow, Chirality and Vorticity PWG <star-fcv-l AT lists.bnl.gov>
> Subject: Re: [Star-fcv-l] Inputs for run-by-run QA variables for new data 
> sets
> 
> Hello Everyone,
>    Can we please finalize a list of QA variables by today and send it to 
> Ashik and
> team before tomorrow's QA board meeting. Here is my proposal, please chime
> in:
> 
> A) QA variables for centrality determination (for collaboration wide bad
> runs):
> 1. <RefMult>
> 2. <TOFMatch>
> 3. <pT> (I am not sure about this)
> 4. <η>
> 5. <φ>
> 6. <DCA>
> 7. <nHitsFit>
> 8. <Vz>
> 
> B) QA variables for FCV analyses (for region of stable run and analysis 
> specific
> bad runs):
> 
> 1. Everything used in centrality determination 2. <TOFMult> 3. <Q1xTPC> 4.
> <Q1yTPC> 3. <Q2xTPC> 4. <Q2yTPC> 5. <Q1xEPD> 6. <Q1yEPD> 7. <Q2xEPD> 8.
> <Q2yEPD> 9. <Q1xZDC> 10. <Q1yZDC> 11. <X>_{ZDC} 11. <Y>_{ZDC} 11.
> <Q1xBBC> 11. <Q1yBBC> 11. <Q2xBBC> 11. <Q2yBBC> 9. <EPDEHits> 10.
> <EPDWHits>
> 
> Anything else?
> Best,
> Prithwish
> 
> 
> 
> On 2021-10-17 21:33, ASHIK IKBAL via Star-fcv-l wrote:
> > Dear Shinlchi,
> >
> > Thanks for pointing this out. We can add <phi> and the vertex related
> > quantity,<dca> in the QA list. We will have separate bad run list for
> > centrality determination and also for the physics analyses as
> > clarified by Rongrong in his email.
> >
> > The reason for adding the Q-vectors in the list is the following. We
> > see there is a run ID dependence of the Q-vectors. The Q-vectors are
> > really necessary for flow analyses, and hence has been added in the QA
> > variable list.
> >
> > Therefore, the idea of this discussion is to get suggestions about the
> > QA variables that are sensitive to centrality determination as well as
> > physics analyses from the PWG.
> >
> > Best,
> > Ashik
> >
> > On Sun, Oct 17, 2021 at 1:33 PM ShinIchi Esumi via Star-fcv-l
> > <star-fcv-l AT lists.bnl.gov> wrote:
> >
> >> Dear Ashik and all
> >> Thanks for the initiation. I have a few comments and questions.
> >> I was wondering why you have chosen to use Q-vectors in stead of more
> >> direct average <phi> at least for TPC, since you do have also average
> >> <eta> and <pT>.
> >> But maybe Q-vector would  be directly used by the analysis, and could
> >> be more sensitive to the location of dead azimuthal sector than
> >> <phi>, so it might be more reasonable as well, though. Another
> >> question is about the vertex qualities, such as run-by-run average
> >> vertex position in radial/xy and z direction?
> >> The “average
> >> DCAxy/z in each event” was also found to be a good indicator for
> >> removing bad events in BES1 especially for central events in
> >> fluctuation analysis, so I was also wondering if run-by-run selection
> >> based on such DCA related information as well, but this might be too
> >> much for the current initial QA studies especially for the general
> >> centrality. Thanks again.
> >> Best regards, ShinIchi
> >>
> >>> On Oct 18, 2021, at 1:49, Prithwish Tribedy via Star-fcv-l
> >> <star-fcv-l AT lists.bnl.gov> wrote:
> >>>
> >>> Hi Ashik and all,
> >>> During our isobar analysis we compiled a list of observables.
> >> This may give us some clue about which quantities are important:
> >>>
> >> https://drupal.star.bnl.gov/STAR/system/files/summary_qa_step2.html
> >>>
> >>> I would still encourage people to provide input before Friday.
> >>> Best,
> >>> Prithwish
> >>>
> >>>
> >>> On 2021-10-17 12:36, ASHIK IKBAL via Star-fcv-l wrote:
> >>>> Hi FCV folks,
> >>>> We had a discussion on the QA variables for new and upcoming data
> >> sets
> >>>> in the last week QA board meeting. So far we (the QA team) are
> >> using
> >>>> the following variables for 19.6 GeV run-by-run QA analysis:
> >>>> 1       runidvsrefmult
> >>>> 2       runidvstofmatched
> >>>> 3       runidvsavgpt
> >>>> 4       runidvsavgeta
> >>>> 5       runidvsavgQ1x
> >>>> 6       runidvsavgQ1y
> >>>> 7       runidvsavgQ2x
> >>>> 8       runidvsavgQ2y
> >>>> 9       runidvsavgEpdQ1x
> >>>> 10      runidvsavgEpdQ1y
> >>>> 11      runidvsavgEpdQ2x
> >>>> 12      runidvsavgEpdQ2y
> >>>> 13.             runidvsbemcmatched
> >>>> The list of  badruns (identified based on the QA variables using
> >>>> automated run-by-run QA algorithm) is really necessary for the
> >>>> centrality team. The QA board has set a deadline of next Friday
> >> (Oct.
> >>>> 22) to finalize the variables.
> >>>> Please speak up if anyone wants to look at any other variables
> >> for the
> >>>> run-by-run QA analysis.
> >>>> Thanks,
> >>>> Ashik
> >>>> --
> >>>> Ashik Ikbal
> >>>> Research Associate
> >>>> Kent State University
> >>>> Department Of Physics
> >>>> Kent, OH 44242, USA
> >>>> Contact no.s: +1 631-504-7647 (USA)
> >>>> +91 8250216234 (India)
> >>>> Alternate e-mails: asheikh2 AT kent.edu ashik AT rcf.rhic.bnl.gov
> >>>> ashik.ikbal.sheikh AT cern.ch
> >>>> _______________________________________________
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> >>
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> >  --
> >
> > Ashik Ikbal
> >
> > Research Associate
> > Kent State University
> > Department Of Physics
> >
> > Kent, OH 44242, USA
> >
> > Contact no.s: +1 631-504-7647 (USA)
> >
> >                       +91 8250216234 (India)
> >
> > Alternate e-mails: asheikh2 AT kent.edu
> >                              ashik AT rcf.rhic.bnl.gov
> >                              ashik.ikbal.sheikh AT cern.ch
> > _______________________________________________
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