STAR Flow, Chirality and Vorticity PWG

[haojiexu <haojiexu AT rcf.rhic.bnl.gov>]

Hi Huan,

There is nothing different between Ntrk and RefMult, sorry for the 
confusion. I have used the cut|eta|<1 in our study, <RefMult> is the 
mean value for each run. I have removed the bad runs for the figures, 
and, yes, <RefMult> with |eta|<0.5 is one the of criteria to identify 
bad runs.

with best regards,
Haojie

On 2022-04-28 08:45, Huan Zhong Huang wrote:
> Hi Haojie,
>
>   Thanks. That is very helpful.
>
>   I do not know the details of quantities used in your figures. In
> some figures Ntrk is used, and some <RefMult> is used. The numbers are
> very different. It is a constant factor between them. Also do you need
> to remove bad runs for this figure? Was <RefMult> part of the criteria
> to identify bad runs?
>
>   Regards,
>
>   Huan
>
> From: haojiexu <haojiexu AT rcf.rhic.bnl.gov>
> Sent: Wednesday, April 27, 2022 12:11 AM
> To: Huan Zhong Huang <huang AT physics.ucla.edu>
> Cc: 'STAR Flow, Chirality and Vorticity PWG'
> <star-fcv-l AT lists.bnl.gov>; 'Van Buren, Gene' <gene AT bnl.gov>
> Subject: Re: [Star-fcv-l] STAR presentation by Haojie Xu for Quark
> Matter 2022 submitted for review
>
> Hi Huan,
>
> Here is the plot under your suggestion. The red squares are the ratios
> you mentioned, the blue ones are the ratios for the rest of the runs.
>
>
> with best regards,
>
> Haojie
>
> On 2022-04-27 14:14, Huan Zhong Huang wrote:
>
> > Haojie,
> >
> > Instead of taking the ratios of upper and lower, will you please
> > try
> > to have a look at the ratios of the RuRu for runs with <Vx> [-0.05,
> > -0.052] to ZrZr runs with <Vx> [-0.06, -0.062] and compare with what
> > you have now?
> >
> > Thanks.
> >
> > Huan
> >
> > From: Star-fcv-l <star-fcv-l-bounces AT lists.bnl.gov> On Behalf Of
> > haojiexu via Star-fcv-l
> > Sent: Tuesday, April 26, 2022 10:20 PM
> > To: Van Buren, Gene <gene AT bnl.gov>; STAR Flow, Chirality and
> > Vorticity
> > PWG <star-fcv-l AT lists.bnl.gov>
> > Subject: Re: [Star-fcv-l] STAR presentation by Haojie Xu for Quark
> > Matter 2022 submitted for review
> >
> > Hi Gene, and all,
> >
> > Thank you for the plot. I also made the same plot with more stat.
> >
> > As I have shown in my previous plots that the multiplicity
> > distribution ratios Ru(<vx> > mean)/Zr(<vx> < mean) (~65 um
> > differences in vx) and Ru(<vx> < mean)/Zr(<vx> > mean) (~9 um
> > differences in vx) are almost the same (see also the attached plot).
> > The result shows no track effeicecy difference at this level.
> >
> > with best regards,
> >
> > Haojie
> >
> > On 2022-04-27 11:54, Van Buren, Gene via Star-fcv-l wrote:
> >
> > Hi, Jamie and all,
> >
> > On this particular point....
> >
> > On Apr 26, 2022, at 7:53 PM, James Dunlop via Star-fcv-l
> > <star-fcv-l AT lists.bnl.gov> wrote:
> > The beam shifts by ~40 um all the time.  It's beam steering at
> > that
> > level,
> > often used to level our luminosity.
> >
> > I offer the following not as a contradiction, but as complementary
> > information on the beam positions (and I'm certainly not making any
> > kind of statement on noticeable impacts from beam positions on track
> > reconstruction efficiency)...
> >
> > The mean <Vx> at z=0 for each fill (which I labeled as "x0") is
> > shown
> > in the below plot obtained from only a small fraction of the event
> > statistics. The colors show the two beam species. I would conclude
> > that whatever beam steering they were doing, they managed to get x0
> > consistent within a given species to within +/-15 microns
> > fill-to-fill. If it weren't for that consistency, we wouldn't see
> > the
> > apparent offset between the two species.
> >
> > But on the core topic of this thread of tracking efficiency
> > differences between the two species, I do not have the confidence to
> > say that SpaceCharge & GridLeak distortion corrections are
> > consistent
> > between the two species at the level necessary to avoid systematic
> > track reconstruction efficiency differences at the 0.1% level. That
> > level of confidence would be difficult to achieve, in my opinion.
> >
> > -Gene
> > _______________________________________________
> > 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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