STAR Flow, Chirality and Vorticity PWG

[ASHIK IKBAL <ashikhep AT gmail.com>]

Dear Prithwish,

Thanks for your email. I've just sent around the details of my paper proposal in a separate email titled "Paper proposal with all the details". Please consider that.

Thank you,

Ashik

On Tue, Jul 20, 2021 at 10:22 AM Prithwish Tribedy <ptribedy AT rcf.rhic.bnl.gov> wrote:

Hello Ashik,
   Thanks for responding to the comments. Can you please send the link to
your paper proposal page so that we can move to the next step.

Best,
Prithwish



On 2021-07-15 17:47, ASHIK IKBAL via Star-fcv-l wrote:
> Dear Conveners, all,
>
> I have prepared the replies to the comments I got during my last FCV
> presentation (July 07, 2021). Please find my responses here:
> https://drupal.star.bnl.gov/STAR/system/files/Reply_FCV_Jul072021_ashik.pdf
>
> I would request you for approval to go forward with the PWGC review.
>
> Thanks,
> Ashik
>
> On Mon, Jul 12, 2021 at 11:59 AM ASHIK IKBAL <ashikhep AT gmail.com>
> wrote:
>
>> Hi Sooraj,
>>
>> Thanks for your email. Here are my responses:
>>
>> The v1 for positive as well negative charge is negative at positive
>> rapidity - at least for the sqrt {s_NN} studied here. You can have a
>> look at (at 27 and 54.4 GeV):
>>
> https://drupal.star.bnl.gov/STAR/system/files/STARprelim_BulkCorr016102019.pdf
>>
>> It's true that the magnetic field affects the v1 for positive and
>> negative charge. But, one should keep in mind that the real scenario
>> is much more complicated due to transport for beam rapidity and
>> other effects like Coulomb, etc.  In our analysis, the Delta v1 is
>> not calculated by simply subtracting v1 b/w positive and negative
>> particles (except v1(omegabar) - v1(omega)), rather by subtracting
>> v1 b/w combinations of produced particles. The combinations have
>> different charge differences. The Delta v1 slope increases with
>> charge differences at 27 GeV and I think it is consistent with the
>> deflection from the magnetic field.
>>
>> Now in my slide 39, I showed the pT/nq dependence of 2 combinations
>> having identical quark contents ((charge diff is zero).). This a
>> test for the coalescence inspired sum rule with pT/nq. You can see
>> that the sum rule holds very well at the intermediate pT region to
>> the pT region shown here. However, at very low pT, there is a
>> difference. While in slide 42, I showed the pT/nq dependence where
>> there are non-identical quark combinations (charge diff is
>> non-zero). So, one should not expect the agreement in the region
>> where there was an agreement for the identical quark content case
>> before. In the other words, this is a violation of the sum rule for
>> non-zero charge diff.
>>
>> Our conclusion of the Delta v1 slope is based on the rapidity
>> dependent study. It is important to mention that we curved out the
>> same phase space (pT/nq-y) region for every particle in our
>> analysis. In this way, we already have the lower pT/nq cut in our
>> analysis.
>>
>> Regarding the mass scaling effect on flow, I would say there is an
>> effect of mass on the flow. This is respected in our measurements.
>> We combine different produced particles in such a way that the
>> combinations have the same mass at the partonic level.
>>
>> Let me know if you need further clarifications.
>>
>> Best,
>> Ashik
>>
>> On Fri, Jul 9, 2021 at 3:28 PM Sooraj Radhakrishnan
>> <skradhakrishnan AT lbl.gov> wrote:
>>
>> Hi Ashik,
>> These are nice studies and interesting results. Can I ask a
>> couple of questions/clarifications?
>>
>> Is the sign of the observed Delta v1 consistent with the deflection
>> from a magnetic field? Shouldnt the v1 from the magnetic field be
>> negative for a positive charge at positive rapidity?
>> I see on your slides 39, 42 that the pT dependences are not trivial.
>> Do you understand these? In 39, there is a difference at low pT,
>> while in 42 its mostly at high pT. So if you have a lower pT cut,
>> would it change your conclusions?
>> When you add the v1 and select the pT ranges, would any mass scaling
>> effects affect the flow values? At low momenta, there is also mass
>> scaling in addition to quark number scaling
>>
>> thanks
>> Sooraj
>>
>> On Wed, Jul 7, 2021 at 6:16 AM ASHIK IKBAL via Star-fcv-l
>> <star-fcv-l AT lists.bnl.gov> wrote:
>>
>> Dear all,
>>
>> Please find my slides here:
>>
>>
> https://drupal.star.bnl.gov/STAR/system/files/FCVmeeting_Jul072021_ashik.pdf
>>
>> Thanks,
>> Ashik
>>
>> On Wed, Jul 7, 2021 at 4:26 AM Niseem via Star-fcv-l
>> <star-fcv-l AT lists.bnl.gov> wrote:
>>
>> Hi All,
>>
>> Please find my slides at this link,
>>
>>
> https://www.star.bnl.gov/protected/bulkcorr/niseem/pwg_2021/ptpt_model_data_3.pdf
>>
>>
>> Thanks,
>> Niseem
>>
>> On 7/6/21 4:49 AM, knayak via Star-fcv-l wrote:
>>
>> Dear Conveners,
>>
>> I would like to give the paper proposal “Directed flow of
>> identified hadrons in Au+Au collisions at 19.6, 27
>>
>> and 54.4 GeV in STAR”. Could you please add my name in the agenda?
>>
>>
>> Thanks,
>> With best regards
>> Kishora
>>
>> Original Message
>>
>> Sender: ShinIchi Esumi via Star-fcv-l<star-fcv-l AT lists.bnl.gov>
>> Recipient: Chirality and Vorticity PWG" <star-fcv-l AT lists.bnl.gov>
>> Date: Monday, Jul 5, 2021 18:52
>> Subject: [Star-fcv-l] FCV PWG meeting on 7/July/2021 Wed. 9:30AM at
>> BNL
>>
>> Dear FCV PWG colleagues
>>
>> We will have our weekly FCV PWG meeting on this Wednesday morning
>> 7/July/2021
>> 9:30AM in BNL (NY time zone) at our usual time and place. So if you
>> have anything to
>> present, please let us know and please post your slide by Tuesday.
>> The zoom room link,
>> ID and pass for the FCV PWG meeting are in our usual drupal agenda
>> page below.
>> Please also keep in mind that all the preliminary plots should have
>> already been there
>>
>> in the summary area below.
>>
>> Best regards, Jiangyong, Prithwish and ShinIchi
>>
>> Meeting agenda page with zoom link :
>> https://drupal.star.bnl.gov/STAR/blog/jjiastar/bulkcorr
>> Preliminary page :
>>
> https://drupal.star.bnl.gov/STAR/pwg/bulk-correlations/bulkcorr-preliminary-summary
>>
>>
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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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>
> --
>
> 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
>
> --
>
> 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
>
> --
>
> 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
>
>
> Links:
> ------
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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