STAR Flow, Chirality and Vorticity PWG

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

Dear Sooraj,

Thank you so much for your comments. Please find the revised version of 
slides here: https://drupal.star.bnl.gov/STAR/node/64854

> It is somewhat surprising that v3 shows good mass scaling, while v2 
> doesn't. Is there an explanation for this?

We are reporting that within the statistical uncertainties, we observe 
that v3 has better mass number scaling.

> From BES-I results, we had claimed that mass number scaling holds for 
> v2 within pT/A < 1.5 GeV (PRC 94, 034908 (2016)). With BES-II we see 
> deviations. Do you have a comparison of the BES-I and BES-II results 
> for the different particle species?

Please find the link to the slides comparing light nuclei v2 results 
between BES-I and BES-II here: 
https://drupal.star.bnl.gov/STAR/blog/rishabh/Comparison-light-nuclei-v2-between-BES-I-and-BES-II-energies

> S4: What is the equation about?

The ALICE Collaboration uses this equation to calculate vn of deuterons 
from vn of protons. The results are shown as blue bands in the figure.

> S4: Why is the fluctuating initial conditions relevant here?

I was hoping to provide motivation for v3 studies of light nuclei.

> S5: Please include EPD and ETOF also under BES-II upgrades

Implemented.

> S5: track momentum and event plane?

Implemented.

> S6: What is track resolution?

Changed it to track momentum resolution.

> S9: What is the low pT you refer to here? Please indicate the range

Implemented.

> S12: seems to be --> is in

Implemented.

> S15: Can you quantify the extend of scaling? May be fit a constant to 
> your lower plots and evaluate the value and uncertainty. This should 
> tell you to within what percentage you can claim v3 scaling

We observe an agreement with mass number scaling within ~10% for v3 of 
light nuclei.

> S16: seems to be --> is in

Implemented.

> S17: You could also point to other light nuclei flow results from STAR 
> (Chengdong's talks for eg). In th outlook, you can indicate the 
> remaining energies to be measured and their relevance

Implemented.

Please let me know if you have any further suggestions for me.

Thanks and regards,
Rishabh









On 2023-08-29 02:38, Sooraj Radhakrishnan wrote:
> Hi Rishabh,
>    Thanks for preparing the nice presentation and the interesting
> results. Please find a few comments from me below
>
> It is somewhat surprising that v3 shows good mass scaling, while v2
> doesn't. Is there an explanation for this?
>
> From BES-I results, we had claimed that mass number scaling holds for
> v2 within pT/A < 1.5 GeV (PRC 94, 034908 (2016)). With BES-II we see
> deviations. Do you have a comparison of the BES-I and BES-II results
> for the different particle species?
>
> S4: What is the equation about?
> S4: Why is the fluctuating initial conditions relevant here?
> S5: Please include EPD and ETOF also under BES-II upgrades
> S5: track momentum and event plane?
> S6: What is track resolution?
> S9: What is the low pT you refer to here? Please indicate the range
> S12: seems to be --> is in
> S15: Can you quantify the extend of scaling? May be fit a constant to
> your lower plots and evaluate the value and uncertainty. This should
> tell you to within what percentage you can claim v3 scaling
> S16: seems to be --> is in
>
> S17: You could also point to other light nuclei flow results from STAR
> (Chengdong's talks for eg). In th outlook, you can indicate the
> remaining energies to be measured and their relevance
>
> Best,
> Sooraj
>
> On Mon, Aug 28, 2023 at 7:09 AM rishabh via Star-fcv-l
> <star-fcv-l AT lists.bnl.gov> wrote:
>
> > Dear Subhash,
> >
> > Thank you for your comments. Please find the revised version of
> > slides
> > here: https://drupal.star.bnl.gov/STAR/node/64854.
> >
> > > s#4: This is for my understanding, how light nuclei v3 of has
> > better
> > > sensitivity to initial fluctuation, if they are formed at later
> > stage?
> >
> > Nucleons will propagate the initial state fluctuations if the light
> > nuclei are formed by the coalescence mechanism.
> >
> > > s#9: Could you indicate the fraction of reduction in error in
> > BES-II
> > > relative to BES-I?
> >
> > The improvement in statistical uncertainty varies from particle to
> > particle and with the pT bin. On average, we observe a 30–40%
> > improvement in BES-II energies compared to BES-I energies.
> > Instead of writing it down on the slide, I was hoping, just like in
> > my
> > SQM talk, that I could tell the fraction while delivering the talk.
> > Please let me know if that is okay.
> >
> > > s#14: At the lowest pT, I see v3 of p and d are consistent. It
> > might be
> > > better if you specify the pt-range for which mass dependence is
> > > observed.
> >
> > Implemented.
> >
> > > s#15: You can indicate fit to proton data beside the function in
> > the
> > > legend. The Y-axis scale of the bottom panels is very large, can
> > you
> > > try reducing them, so the level of scaling would be clearly
> > visible.
> >
> > Implemented.
> >
> > Please let me know if you have any further suggestions for me.
> >
> > Thanks and regards,
> > Rishabh
> >
> > On 2023-08-28 13:14, subhash via Star-fcv-l wrote:
> > > Dear Rishabh,
> > >
> > > Nice slides. I have a few suggestions for your consideration:
> > >
> > > s#4: This is for my understanding, how light nuclei v3 of has
> > better
> > > sensitivity to initial fluctuation, if they are formed at later
> > stage?
> > > s#9: Could you indicate the fraction of reduction in error in
> > BES-II
> > > relative to BES-I?
> > >
> > > s#14: At the lowest pT, I see v3 of p and d are consistent. It
> > might
> > > be better if you specify the pt-range for which mass dependence is
> > > observed.
> > >
> > > s#15: You can indicate fit to proton data beside the function in
> > the
> > > legend.
> > > The Y-axis scale of the bottom panels is very large, can you try
> > > reducing them, so the level of scaling would be clearly visible.
> > >
> > >
> > > Thanks and regsrds,
> > > Subhash
> > >
> > >
> > > On 2023-08-24 10:01 PM, webmaster--- via Star-fcv-l wrote:
> > > > Dear star-fcv-l AT lists.bnl.gov members,
> > > >
> > > > Rishabh Sharma (rishabhsharma AT students.iisertirupati.ac.in) has
> > > > submitted a
> > > > material for a review, please have a look:
> > > > https://drupal.star.bnl.gov/STAR/node/64854
> > > >
> > > > Deadline: 2023-09-03
> > > > ---
> > > > If you have any problems with the review process, please contact
> > > > webmaster AT www.star.bnl.gov
> > > > _______________________________________________
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>
> --
>
> 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