STAR Flow, Chirality and Vorticity PWG

[Zhiwan Xu <zhiwanxu AT physics.ucla.edu>]

Hi Fuqiang and Prithwish,
 I think I misunderstood your question. The Q2 cut and v2 POI cut are always 
the same. |eta| < 0.5 for TPC EP. and |eta| < 1 for EPD EP. Otherwise, the v2 
will not go to zero when Q2 go to zero. 
 We can discuss the details on this Friday's CME meeting.
 Thank you.

Best,
Zhiwan

Zhiwan Xu, 
Department of Physics and Astronomy, UCLA
zhiwanxu AT physics.ucla.edu

----- Original Message -----
From: ShinIchi Esumi via Star-fcv-l <star-fcv-l AT lists.bnl.gov>
To: STAR Flow, Chirality and Vorticity PWG <star-fcv-l AT lists.bnl.gov>
Sent: Tue, 15 Mar 2022 08:40:10 -0700 (PDT)
Subject: Re: [Star-fcv-l] FCV PWG meeting on 02/Mar/2022 Wed. 9:30 AM at BNL

Dear Diyu
Could you please tell me the importance on the azimuthal acceptance 
correction 
for the PIDed particle for this measurement? Do you see any difference 
between 
X and Y contributions of the event plane resolution from ZDC? For your a1 
parameter (sin term in stead of cos), they are mostly zero, but some of the 
delta_a1 parameters are comparable to delta_v1, which might be needed to 
be studied and discussed more in the PWG, which could be important and 
interesting, is it somewhat significant only for pi+/pi-?  Do you understand 
why 
the signal seems to be stronger including phi-weighting correction (default) 
than 
without the weighting correction? Do you use other event plane information 
from 
TPC or BBC or EPD to determine the resolution of ZDC? Could you describe a 
little more about how you determine (and calibrate) the event plane to get 
the 
event plane and resolution? (1) gain correction on each strip in ZDC/SMD, 
(2) re-centering of Qx and Qy, (3) Fourier flattening of Psi. Everything is 
done 
as a function of centrality and z-vertex? Then get the resolution by two-sub 
method with chi extraction etc...
Best regards, ShinIchi

> On Mar 1, 2022, at 18:38, dshen via Star-fcv-l <star-fcv-l AT lists.bnl.gov> 
> wrote:
> 
> Dear Conveners and all,
> 
> Please find the slides for our updates via link below:
> https://drupal.star.bnl.gov/STAR/system/files/Updates%20on%20paper%20proposal%20II.pdf
> 
> We also prepared a draft of analysis note for your reference:
> https://drupal.star.bnl.gov/STAR/system/files/main_11.pdf
> 
> This update mainly focus on addressing the comments collected in my last 
> presentation.
> Just a quick reminder, those comments are:
> 
> General recommendation:
> Combine relevant items from various presentation materials and prepare
> a document with analysis details in one place and share with FCV. This
> will help focus our discussion, help experts to pinpoint their
> comments and save time for PAs and everyone. Also, this document can
> eventually metamorphose into the analysis note. While making further
> materials please consider addressing the following points, maybe make
> small notes on the points.
> 
> i) Estimate Delta_v1 expected from coulomb interaction in peripheral 
> collisions
> 
> ii) Address how to understand large Delta_v1 is seen for protons and
> not for kaons and pions.
> 
> iii) It seems we see a difference in "Delta_v1" vs "y" between Au,
> Zr+Ru species. How do we understand this system size dependence?
> 
> v) Consider adding differential v1 measurements, pt differential v1,
> v1 separately for Zr+Zr and Ru+Ru species (if statistics is not enough
> can consider two pt bins for example). If <pT> values are different
> between different species it will be good to show the pT dependence
> for each species even with two pt bins.
> 
> vi) Is it possible to estimate the relative contribution of
> transported quark in Delta_v1?
> 
> vii) Consider a model calculation w/o EM field (e.g. UrQMD, AMPT) to
> strengthen the point that the centrality dependent sign change cannot
> be reproduced by non EM-field effects.
> 
> viii) Short summary for why PRX (250 words) will be useful. Usually
> published along with paper. For now even a short para will be helpful
> to move forward (e.g. during PWGC proposal).
> 
> Thanks,
> Diyu
> 
> 
> On 2022-03-01 15:08, dshen via Star-fcv-l wrote:
>> Dear Conveners,
>> I would like to give an update on the research of change splitting of
>> v1 in Au+Au and isobar collisions at 200 GeV.
>> The slides will be send later.
>> Best,
>> Diyu
>> On 2022-02-28 14:34, subhash via Star-fcv-l wrote:
>>> Dear All,
>>> We shall have our FCV PWG meeting this Wednesday (02/Mar/2022) at 9:30
>>> AM in BNL (NY time zone). If you would like to present, please let us
>>> know. Please try posting your slides by Tuesday. The agenda items will
>>> be collected at:
>>> https://drupal.star.bnl.gov/STAR/blog/jjiastar/bulkcorr
>>> Thanks and regards,
>>> Jiangyong, Prithwish and Subhash
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