STAR Flow, Chirality and Vorticity PWG

["Md. Nasim" <mnasim2008 AT gmail.com>]

Hi Rishabh,

                   I have one suggestion for slide 12.

It is nice to see that AMPT+Coal explain the v2 of deuterons. It would be good to check if AMPT can explain the v2 of protons or not.

If AMPT fails to explain the v2 of protons but AMPT+Coal explains v2 of deuterons, then we need to be careful while making a conclusion from it.

On Tue, Aug 29, 2023 at 2:38 AM Sooraj Radhakrishnan via Star-fcv-l <star-fcv-l AT lists.bnl.gov> 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
>> ---
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--

Sooraj Radhakrishnan

Research Scientist,

Department of Physics

Kent State University

Kent, OH 44243

Physicist Postdoctoral Affiliate

Nuclear Science Division
Lawrence Berkeley National Lab
MS70R0319, One Cyclotron Road

Berkeley, CA 94720

Ph: 510-495-2473

Email: skradhakrishnan AT lbl.gov

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--

Thanks,

With Best Regards,

Nasim

----------------------------------------------------------------------------------------------

Md Nasim                                                                                         

Assistant Professor           

Department of Physics

Indian Institute of Science Education and Research (IISER) Berhampur, 

Engineering School Road,

Berhampur, Odisha 760010

India

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