STAR Flow, Chirality and Vorticity PWG

[Shengli Huang <shengli.huang AT stonybrook.edu>]

Hi Fuqiang,

    Let us pin down the number accurately. From the data table for 0-20% AuAu:

https://drupal.star.bnl.gov/STAR/files/starpublications/223/data.html

Flow=4.04% and nowflow=1.15%, so the nonflow fraction for total signal will be 1.15^2/(4.04^2+1.15^2)=7.5% for deta>0.7, right?

Regards

Shengli

On Wed, Jan 24, 2024 at 9:10 PM Wang, Fuqiang via Star-fcv-l <star-fcv-l AT lists.bnl.gov> wrote:

Hi Shengli,

Yes, this is the right paper. Fig.5 left most central point (black/open circle)^2~10% (note the open is scaled down by x2). This is for Deta>0.7. From Fig.4 left full event is about x2 of that at Deta>0.7. So that’s the 20% I was saying. The uncertainties are relatively large. 

Best regards,

Fuqiang

On Jan 24, 2024, at 1:49 PM, Shengli Huang via Star-fcv-l <star-fcv-l AT lists.bnl.gov> wrote:



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Dear Fuqiang,

     I just read the paper about nonflow in PWG discussion today:

https://arxiv.org/pdf/1409.2043.pdf. 

First I hope I find the correct one and understand it accurately. 

According to this paper, it is stated that the nonflow is only 5% in 20-30% AuAu with deta>0.7, which differs significantly to 20% in central AuAu as you said. Can you tell us more details to understand it?

Thanks!

Shengli

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