STAR QA Board

[Rosi Reed <rosijreed@lehigh.edu>]

Hi Ben,

Even though the statistics will be low, if this is due to the beam
conditions you should see the same shift in the vpd Vz, which could be
a good cross-check.

Cheers,

Rosi

On Tue, Jul 14, 2020 at 2:15 PM Benjamin Kimelman via STAR-QAboard-l
<star-qaboard-l@lists.bnl.gov> wrote:
>
> Hi Gene and the QA Board,
>
> I've been looking more through my QA and I have identified the run where 
> the Vz distribution drops on day 72: 20072034.
>
> You can look at my QA plots for that run here: 
> https://www.star.bnl.gov/protected/lfsupc/bkimel/productionQA/AuAu_19p6GeV_2019_calib/runs/AuAu_19p6GeV_run_20072034_productionQA.pdf
>
> The vertex does seem to be shifted more in the negative direction. It was 
> also the first physics run of a new fill after about 12 hours of pedestals 
> and cosmics. This makes me more inclined to believe that the shift we see 
> in my QA in the mean Vz is due to beam conditions.
>
> Ben Kimelman
> Ph.D. Candidate, Nuclear Physics Group
> UC Davis
> He/him/his
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-- 
Rosi Reed
RHIC/AGS UEC member
Associate Professor, Physics Department
Lehigh University
(610)758-3907
16 Memorial Drive East Office 406
Bethlehem, PA 18015
she/her/hers