Minutes - XEM Minutes

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Meeting Information

Meeting Place: Virtual - Bluejeans
Meeting Time: Tuesday, 11:30 EST
Meeting Link: Refer to the weekly reminder email or calendar event for connection information.

Current Tasks

Burcu
Looking at pi/e- ratios for X>1 data.
  • x>1 data is well above the pion threshold of 4.65 GeV and the pion sample is contaminated.
  • Based on the study need to decide on Noble Gas Cherenkov gas mix, unless we opt out using it (hopefully for upcoming week).
Casey
Write-up calibration procedures for XEM hodoscope, and calorimeter.
  • Illustrate the usefulness of the diagnostic plots.
Run the XEM model for all EMC settings
Find what is happening to the YTrack= -2.5 blocks pulseInt
Open the reference time windows for the 2019 data slightly. Include random hits, which should be removed by good electron cuts.
Work on tracking in 2018 data. Pruning algorithm work
  • Ali from Pion_LT running has some scripts / plots to help in this process.
  • Possibly narrow the windows to select just the main peak?
Dave

EMC ratio anomaly, where it is not yet correct.

Abishek
Working on the point-to-point dependence of the error on acceptance.
Must add ‘added error’ to all momentum settings.
  • Added error is until the Chi-2 value goes to ~1 per DOF. This is the ideal value, and this will give us an idea of the point-to-point error associated with the acceptance. **
  • Possibly combine the two settings that have okay ratios (Data/MC) across the acceptance.

Systematic tracking efficiency is hard to pin down. Rel. Uncert. Comes from Deb’s study from rate dependence.

Cameron
Work through reference time and timing window cuts.

Recently Completed

Aishek
Isotopic purity assessment of boron targets
Carbon target EMC ratio with Dave M's boiling slopes. (still 2% off)
Looked at the EMC ratios with mc-single-arm detector checks turned off.
Dave
Log entry on cryo target density uncertainty
Look at target boiling difference between Dave Mack and our values.
Burcu
Reproduced Abishek's pion contamination (PC) study with the 21 deg EMC data (C and LD2).
Discussed the impact of the pre-shower and trigger cuts (ELHI and ELLO) on the PC study.
Casey
Set up analysis location on CDAQ machine (XEM-2022).
Ran the hodoscope calibration and improved the fit range of velocity and cable length difference.
Looked at possible problems with X>1 calorimeter calibration.
Checked 2019 kinematicaly forbidden range
Cameron
Many, many shifts.