STAR Flow, Chirality and Vorticity PWG

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

Hi Isaac,

I would encourage you to present in next PWG meeting to have more 
detailed discussion.
Based on my experience on a few event shape engineering analyses, the 
definition of q2 is the magnitude of Q2  = Sum(w*exp(i2phi))/Sum(w). So 
the denominator should include not only the multiplicity M but also the 
other EPD weights.
Hope this could be helpful.

Cheers,
Zhenyu


在 2023-03-16 04:42，Mooney, Isaac via Star-fcv-l 写道：
> Hi FCV members,
>
> I’m a member of the HardProbes PWG, and I’ve been investigating some
> interesting behavior with q vectors as part of my analysis. I was
> splitting events into q2 classes, before seeing the plot I’m showing
> on slide 4 of the attached pdf, which raised the question of whether
> this is actually possible to do meaningfully.
> I was hoping to show the slides at the meeting today, but since it was
> canceled, I’m sending them here. If you have a minute, please take a
> look and let me know if you have any thoughts. To me the behavior is
> non-intuitive enough that it’s possible there’s a solution that is
> very obvious to an expert eye. And please let me know if anything in
> the slides is not clear and I would be happy to clarify it.
>
> I really appreciate any time you have to think about this!
> Best,
> Isaac
>
>
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