STAR Flow, Chirality and Vorticity PWG

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

Hi CW,

Thanks for your prompt reply.
I actually did similar derivations, based on my understanding, and I 
found finally there is a disconnection between the fitting functions. 
See Eq.7 of https://drupal.star.bnl.gov/STAR/system/files/invMass4ml.pdf
The function form of my Eq.7 is quite different from your fitting 
function, and I can't find out why is it...
Could you provide more middle steps to guide me to your fitting 
function?

Thanks,
Diyu


On 2023-04-07 04:59, Robertson, Charles William wrote:
> Hello Diyu,
>
>  Thank you for your question. I made two slides explaining this in
> some more detail.
>  They can be found here:
> https://drupal.star.bnl.gov/STAR/system/files/cos_theta_fit.pdf
>
>  Let me know if you have any other questions,
>  -CW
>
> -------------------------
>
> From: dshen <dshen AT rcf.rhic.bnl.gov>
> Sent: Thursday, April 6, 2023 10:08 AM
> To: Robertson, Charles William <rober558 AT purdue.edu>; STAR Flow,
> Chirality and Vorticity PWG <star-fcv-l AT lists.bnl.gov>
> Cc: 'subhash' <subhash AT rcf.rhic.bnl.gov>
> Subject: Re: [Star-fcv-l] FCV PWG meeting on 05/April/2023 Wed. 9:30
> AM EDT
>
> ---- External Email: Use caution with attachments, links, or sharing
> data ----
>
> Hi CW,
>
> I am interested in this inv-mass method, maybe because I am doing the
> J/psi spin alignment analysis. So I recalled myself today your
> presentation, and I found I have a terrible memory. Could you explain
> again why/how the fitting function f in slide 4 is derived? and why
> <cos^2 theta*> = (1+\rho_fit)/3 ?
>
> Thank you!
>
> Diyu
>
> On 2023-04-05 23:50, Robertson, Charles William via Star-fcv-l wrote:
> > Hello all,
> >
> >  I updated my slides based on some of the quick comments during the
> > meeting.
> >  They can be found here:
> https://drupal.star.bnl.gov/STAR/system/files/PhiMesonFCVMeeting040523_2.pdf
> [1]
> >  S6: Statistical error bars are now correctly plotted, only an issue
> > with plotting
> >  S14: Cos Theta Star Sqrd Real/Mix Ratio for an extended invariant
> > mass range
> >  S15: Some example fits for the yield method at 200 GeV, using
> > different polynomial backgrounds. Slight variation in yield
> parameter
> > "A".
> >
> >  Thanks,
> >  -CW
> >
> > -------------------------
> >
> > From: Star-fcv-l <star-fcv-l-bounces AT lists.bnl.gov> on behalf of
> > Robertson, Charles William via Star-fcv-l <star-fcv-l AT lists.bnl.gov>
> > Sent: Wednesday, April 5, 2023 9:28 AM
> > To: 'STAR Flow, Chirality and Vorticity PWG'
> > <star-fcv-l AT lists.bnl.gov>; 'subhash' <subhash AT rcf.rhic.bnl.gov>
> > Subject: Re: [Star-fcv-l] FCV PWG meeting on 05/April/2023 Wed. 9:30
> > AM EDT
> >
> >               ---- External Email: Use caution with attachments,
> links, or
> > sharing data ----
> >
> >  Hello,
> >
> >  My slides for today can be found here:
> https://drupal.star.bnl.gov/STAR/system/files/PhiMesonFCVMeeting040523_1.pdf
> [2]
> >  Thank you,
> >  -CW
> >
> > -------------------------
> >
> > From: Star-fcv-l <star-fcv-l-bounces AT lists.bnl.gov> on behalf of
> > Xionghong via Star-fcv-l <star-fcv-l AT lists.bnl.gov>
> > Sent: Tuesday, April 4, 2023 8:52 PM
> > To: 'STAR Flow, Chirality and Vorticity PWG'
> > <star-fcv-l AT lists.bnl.gov>; 'subhash' <subhash AT rcf.rhic.bnl.gov>
> > Subject: Re: [Star-fcv-l] FCV PWG meeting on 05/April/2023 Wed. 9:30
> > AM EDT
> >
> > ---- External Email: Use caution with attachments, links, or sharing
> > data ----
> >
> > Dear Subhash,
> >
> > My slides for the meeting tomorrow can be found at the link
> https://drupal.star.bnl.gov/STAR/system/files/PWG_LightNucleiv1atBES2_Xiongh
> [3]
> > ong_20230405.pdf.
> >
> > Thanks and best regards,
> > Xionghong
> >
> > > -----Original Message-----
> > > From: star-fcv-l-bounces AT lists.bnl.gov
> > [mailto:star-fcv-l-bounces AT lists.bnl.gov]
> > > On Behalf Of Xionghong via Star-fcv-l
> > > Sent: Tuesday, April 4, 2023 9:50 AM
> > > To: 'subhash' <subhash AT rcf.rhic.bnl.gov>; 'STAR Flow, Chirality and
> > Vorticity
> > > PWG' <star-fcv-l AT lists.bnl.gov>
> > > Subject: Re: [Star-fcv-l] FCV PWG meeting on 05/April/2023 Wed.
> 9:30
> > AM
> > EDT
> > > Dear Subhash,
> > >
> > > I would like to present light nuclei v1 measurements at 14.6 GeV
> and
> > 19.6
> > GeV.
> > > Please add me to the agenda. I will post my slides later. Thanks.
> > >
> > > Best regards,
> > > Xionghong He
> > >
> > > > -----Original Message-----
> > > > From: star-fcv-l-bounces AT lists.bnl.gov
> > > [mailto:star-fcv-l-bounces AT lists.bnl.gov]
> > > > On Behalf Of subhash via Star-fcv-l
> > > > Sent: Monday, April 3, 2023 9:55 PM
> > > > To: STAR Flow, Chirality and Vorticity PWG
> > <star-fcv-l AT lists.bnl.gov>
> > > > Subject: [Star-fcv-l] FCV PWG meeting on 05/April/2023 Wed. 9:30
> > AM
> > > > EDT
> > > >
> > > > Dear All,
> > > >
> > > > We shall have our weekly FCV PWG meeting this Wednesday
> > > > (05/April/2023) at
> > > > 9:30 AM EDT. If you would like to present please let us know.
> > Please
> > > > try
> > > posting
> > > > your slides by Tuesday. The agenda will be collected at:
> > > > https://drupal.star.bnl.gov/STAR/blog/jjiastar/bulkcorr
> > > >
> > > > Zoom details are copied below.
> > > >
> > > > Thanks and regards,
> > > > Prithwish, Zhenyu and Subhash
> > > >
> > > >
> > > > ZOOM LINK FOR FCV MEETING:
> > > > Join ZoomGov Meeting
> > > >
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> > > > cDQ1UT09
> > > >
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> https://urldefense.com/v3/__https://bnl.zoomgov.com/j/1612377416?pwd=V
> [4]
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> Links:
> ------
> [1] 
> https://drupal.star.bnl.gov/STAR/system/files/PhiMesonFCVMeeting040523_2.pdf
> [2] 
> https://drupal.star.bnl.gov/STAR/system/files/PhiMesonFCVMeeting040523_1.pdf
> [3] 
> https://drupal.star.bnl.gov/STAR/system/files/PWG_LightNucleiv1atBES2_Xiongh
> [4] 
> https://urldefense.com/v3/__https://bnl.zoomgov.com/j/1612377416?pwd=V
> [5] 
> https://urldefense.com/v3/__https://bnl.zoomgov.com/u/abVqdu5fbU__;!!P