STAR HardProbes PWG

["Zetong Li" <li_vefree AT m.scnu.edu.cn>]

Hello convenors,

I am
Zetong Li from SCNU. I am currently assisting Yuri in scanning through the
Run18 Isobar data from the st_hf and st_hf_adc to identify file names and
eventIDs containing Upsilon candidates. As we all know, both the Run18 Isobar
data and the data from 2011 to 2014 show a large Upsilon peak width, and we
suspect that this may be related to momentum resolution caused by TPC
misalignment. If we can identify all picoDst files containing Upsilon
candidates in the Run18 Isobar data, as well as their eventIDs, they can be used for setting up the machinery for checking TPC
misalignment for Run23+25 using Upsilon peak width.

However,
during the retrieval of files corresponding to the runID, we discovered that
some run files were unavailable. We also realized from the website (https://www.star.bnl.gov/public/comp/prod/localdata/ProdDDstreams_pico.html)
that currently, only 40% of the picoDst files can be read from the distributed
disk. As a result, we found that compared to the Upsilon candidates we
previously obtained, we can now only find approximately 40% of them in the
PicoDst files. Here is the result recently((https://drupal.star.bnl.gov/STAR/system/files/Upsilon_candidate.pdf).

Therefore,
we would like to inquire if you can assist us in scheduling the restoration of
st_hf and st_hf_adc datasets. If possible, could you please provide us with an
estimate of the restoration time?

Thank you.

Best
regards,

Zetong