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Agenda

Dependence of dE/dx resolution on number of hits (20% truncation) and momentum for pions

Attendees: Mark I., Justin, Daniel, Naomi, Sean, Mahmoud, Beni, Mark D., Susan, Alex A., S.T.

Daniel continues to work on testing new ML algorithm on di-lepton data
Naomi reported on her continuing CDC dE/dx studies.
- Finds good qualitative agreement between bggen and data
  - Strange bump in dEdx for tracks near 70 degrees shows up in both
  - Bumps and wiggles depend on number of tracks
- Improved dE/dx (for amplitude) correction map (to get rid of θ dependence in data)
  - Corrected dE/dx shows better separation between proton and kaon bands at low momentum
  - Corrected dE/dx looks more like MC dE/dx
  - Correction map does not work as well for dE/dx using CDC integral
S.T. showed dependence of dE/dx on number of hits used in calculation and momentum
- Naomi's correction was not applied yet
- Same general shape for all momenta except for low N in CDC
Mahmoud continues comparing timing for MC/data using η→γγ
- MC resolution does not depend on p, but real data does
- MC resolution is worse than real data resolution
- Means for both data and MC depend on p