STAR Flow, Chirality and Vorticity PWG

[Cameron Racz <cracz001 AT ucr.edu>]

Hello convenors,

I wanted to give answers to the comments and questions expressed during my preliminary request. These will also be uploaded to my Drupal page for my request.

1) Do the minimum hits required for each subevent cut out some of the peripheral events?

The minimum number of primary TPC tracks for 60% centrality is 16 tracks. My requirements for minimum hits (5 in TPC and total of 14 in the EPD) does not necessarily cut off any centralities that I’m trying to analyze. We still see events higher than 60% passing all cuts. Removing my minimum hits requirements would of course increase the number of events, but these would be events where the event plane angles are not fully reliable in all subevents simultaneously.

However, I did find other minimum hits requirements in my analysis (5 hits in TPC A, which is not used) and this has been removing a relatively small amount of events that are good. This mistake has been corrected and the results are being recalculated.

2) Are the cuts used in the 3 GeV light nuclei paper exactly the same as in this analysis? This is necessary to reuse the TPC efficiency values.

I found that there is one difference between our two analyses: they used a r_vertex cut of 2 cm while I am using 1.5 cm. I am in the process of recalculating the TPC efficiency values for protons, deuterons, and tritons. I don’t think this change will have much of an effect on the results in my analysis, including the results I’m requesting for preliminary here.

3) The fit range used for the v3 slope measurements should be tweaked to see what range will work best.

This check will be done for the paper to ensure that the slope measurement will be accurate. Currently I don’t have a reference to the slope measurement in my CPOD slides for the sake of time. The slope measurement may be included in the backup slides if necessary, but my guess is that changing the fit range a little won’t affect the slope measurement much.

Please let me know if there are any more comments or questions for this request.

Thank you,

Cameron Racz

Ph.D. Candidate 

Heavy-ion Physics Group

University of California, Riverside

On Nov 15, 2022, at 10:06 AM, Cameron Racz <cracz001 AT ucr.edu> wrote:

Hi convenors,

I would like to present a preliminary request for one plot of v3 vs rapidity at 3 GeV for CPOD. This will be a different v3 vs rapidity plot than the one I already have preliminary for. I will upload slides later.

Thank you,

Cameron Racz

Ph.D. Candidate 

Heavy-ion Physics Group

University of California, Riverside

On Nov 14, 2022, at 7:18 AM, subhash via Star-fcv-l <star-fcv-l AT lists.bnl.gov> wrote:

Dear All,

We shall have our weekly FCV PWG meeting this Wednesday (16/November/2022) at 9:30 AM EDT. 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

We would also like to hear the status of analysis from those who have submitted abstracts to ICPAQGP-2023.

Thanks and regards,
Jiangyong, Prithwish and Subhash


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