STAR Flow, Chirality and Vorticity PWG

["Tang, Aihong" <aihong AT bnl.gov>]

Dear all,

I am quite puzzled by the Purdue group's claim made at the FCV meetings. They asserted that a derivation for their correction procedure for detector effects in global spin alignment analysis is unnecessary. I firmly believe that whenever possible a robust correction procedure should be a bottom-up approach, wherein all components are thoroughly understood and their contributions are under control.

Since the Purdue group failed to provide such a derivation despite a number of requests made to them, I took some time to decompose and write down the terms involved in their procedure. Upon careful examination, it was found that the Purdue group's correction procedure does not yield the intended correction.

You can find the link to the document here:

https://drupal.star.bnl.gov/STAR/system/files/DecomposePurdueSpinAlignmentProcedure_May2024.pdf

Thanks,

Aihong