STAR Flow, Chirality and Vorticity PWG

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

Dear Priyanshi, PAs,

Thanks for preparing the responses to the suggestions from PWGC. They 
look good to me.
Did you posted/prepared a paper draft? Please circulate them as well to 
the list when ready.

Thanks and regards,
Subhash

On 2024-07-23 12:11 AM, psinha wrote:
> Dear Convenors and All,
>
> After the PWGC preview, we have prepared the replies to the PWGC
> comments and suggestions. Please find below the link to the replies,
> updated webpage and analysis note.
>
> PWGC comment reply:
> https://www.star.bnl.gov/protected/bulkcorr/vipul/IsobarFlow/WebPage/pwgcreview/Replies_PWGCpreview.v1.pdf
>
> Webpage:
> https://www.star.bnl.gov/protected/bulkcorr/vipul/IsobarFlow/WebPage/index.html
>
> Analysis Note:
> https://www.star.bnl.gov/protected/bulkcorr/vipul/IsobarFlow/WebPage/analysisnote/AnalysisNote_EllipticFlow_Isobar200GeV_v2.pdf
>
> Kindly let us know if you have any comments and suggestions.
>
> Thanks and regards,
> Priyanshi Sinha (for the PAs)
>
> On 2024-03-16 01:22, Sooraj Radhakrishnan via Starpapers-l wrote:
> > Date: 03/15/2024
> > Participants:  Chitrasen Jena, Priyanshi Sinha, Vipul Bairathi, Ting
> > Lin, Xiaoxuan Chu, Nu Xu, Prithwish Tribedy, Subhash Singha, Isaac
> > Mooney, Nihar Sahoo, Yi Yang, Shuai Yang, Yue Hang Leung, Zaochen Ye,
> > ShinIchi Esumi, Sooraj Radhakrishnan
> > Title: Elliptic flow of strange and multi-strange hadrons in isobar
> > collisions at √sNN = 200 GeV at RHIC
> >
> > Target journal: Phys. Rev. C
> >
> > Proposal page:
> > https://www.star.bnl.gov/protected/bulkcorr/vipul/IsobarFlow/WebPage/
> >
> > Presentation:
> > https://drupal.star.bnl.gov/STAR/blog/psinha/PWGC-preview-v2-multi-strange-hadrons-isobar
> > The PWGC panel previewed the paper proposal from FCV PWG. The panel
> > found that the analysis is mature and results are important and
> > interesting, and the paper should move forward. The journal choice was
> > also found to be appropriate. The following points were discussed.
> > Q: The predictions for the ratio of the initial geometry asymmetry
> > between the two isobars is much larger the measured ratio of charged
> > hadron v2 between the two systems (shown on S2). Why is this so? Also,
> > why is there a non monotonous centrality dependence for the ratio?
> >
> > A: These are early predictions. Newer calculations agree better with
> > the measured v2 ratio. Non-monotonous centrality dependence could be
> > from interplay of difference in multiplicity and difference in
> > deformation
> >
> > Q: The variations in cuts are rather small. This may not reflect the
> > range of variation of your systematic uncertainty. So dividing by
> > sqrt(12) could be under-estimating the error. Could vary the cuts over
> > a wider range and see if you are capturing the range of variation
> >
> > A: Will evaluate and update
> > Q: Do you have a table quantifying the magnitude of systematic
> > uncertainties from various sources?
> >
> > A: Not in today's presentation. But have it in the presentations made
> > to PWG previously. Can include in the analysis note
> > Q: Can you extend the pT dependent v2 measurements to higher pT?
> >
> > A:  The uncertainties get large beyond the bins shown in the plot.
> > Will see if its possible to measure for higher pT bins
> >
> > C: Could show for some of the particles where statistics is good
> >
> > A: Yes, will do
> > Q: On S18 (Fig.11), please zoom in the y-range for the ratio plots for
> > better readability
> >
> > A: Yes, will do
> > Q: The ratio shown on S19 (Fig.12), for eg for K0s, shows enhancement
> > only above pT = 2 GeV/c. In this case can it be concluded that the
> > enhancement is from system size dependence of collectivity? Could be
> > from other effects
> >
> > A: We don't have a clear answer for it. Will investigate further
> >
> > C: Could calculate the eccentricity scaled v2 and compare between
> > different systems. This might help to better evaluate the system size
> > dependence
> >
> > A: Yes, will do
> >
> > Q: For Rcp, we see a clear system size dependence. Why it is not so
> > strong for v2
> >
> > A: v2 depends more on the event shape than Rcp
> >
> > Q: Lambda v2 clearly deviates systematically from the NCQ scaling
> > (S17). Do we see similar trend in Au+Au?
> >
> > A: In Au+Au also we see that overall NCQ scaling holds within 10-15%.
> > Will check the behavior of Lambda in Au+Au
> >
> > C: You see similar deviation for both Lambda and Lambda_bar
> >
> > A: Yes, will check further and also in Au+Au
> > Q: Do you have model comparison to the v2 ratios (S18)?
> >
> > A: Model calculations become challenging for different particles as
> > the error bars are large
> >
> > Q: Can you compare to the ratio of initial eccentricities?
> >
> > Q: Yes, will check that
> > Q: The deviations of the AMPT model calculations from data are
> > significant, particularly for K0s and Lambda (S20). So cannot say
> > models describe data
> >
> > A: Yes, will modify the conclusions accordingly
> >
> > C: The large centrality range used could wash out effects of
> > deformation difference. Could try comparison for more central
> > collisions
> >
> > Q: Do you have AMPT calculations without string melting? Is there a
> > difference between the two modes?
> >
> > A: No, we have the calculations only with string melting. Will do
> >
> > Q: For the high pT bins (S15), do you have an estimate of the non-flow
> > contributions? The high pT bins particularly in peripheral centrality
> > seem to be dominated by non-flow
> >
> > A: We don't have an evaluation of the non flow. Will do the evaluation
> >
> >
> > --
> >
> > Sooraj Radhakrishnan
> >
> > Research Scientist,
> > Department of Physics
> >
> > Kent State University
> >  Kent, OH 44243
> >
> > Physicist Postdoctoral AffiliateNuclear Science Division
> > Lawrence Berkeley National Lab
> > MS70R0319, One Cyclotron Road
> > Berkeley, CA 94720
> > Ph: 510-495-2473 [1]
> >
> > Email: skradhakrishnan AT lbl.gov
> >
> >
> > Links:
> > ------
> > [1] tel:%28510%29%20495-2473
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