GlueX PID Meeting, February 9, 2021

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Meeting time and day: 10:30 am, Tuesdays

Meeting Connections

  1. To join via a Web Browser, go to the page [1]
  2. To join via Polycom room system go to the IP Address: ( and enter the meeting ID: 927733173.
  3. To join via phone, use one of the following numbers and the Conference ID: 927733173.
    • US or Canada: +1 408 740 7256 or
    • US or Canada: +1 888 240 2560


  1. Announcements:
  2. Updates:
    1. Multivariate method
    2. CDC dE/dx
    3. PIDFOM
  3. PID systematics task force


  • CDC dEdx discussion:
    • Naomi mapped regions where dEdx using integral provided better pion-proton separation than using amplitude
      • Thinking of using simple box cut in θ and p to choose which method to use
      • Look at pion-proton separation in MC?
    • Simulation code compensates for drift gas issues during spring 2018 run
      • Deterioration of gain for clusters drifting from far from wire using linear model with cutoff at some radius
        • Cutoff radius 6.5 mm at start of spring 2018 -> 4 mm at end
      • MC studies by collaborators suggest over-correction for gas deterioration effect for later runs in spring 2018
        • Larger tails in real data compared to MC?