Π polarizability Meeting Jan 8, 2020

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Meeting Info.

Meeting Time And Location

10:00 EST (JLab time)

CC L207

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Attending: Elton, Mark, Andrew, Ilya

  1. Previous meeting: Dec 18, 2019
  2. Announcements
    • Tim has setup the first meeting to discuss the CPP geometry for next week Wed Jan 15 at 2 pm in TED 2504
  3. Update on Run
  4. Data Analysis - Andrew
    • e-/pi- TMVA
    • Andrew presented his preliminary TMVA analysis
    • We realized that the TOF calibration may not be correct. It will be updated before further studies for next week
    • The e/p ratio provides considerable e/pi separation on its own.
  5. Discussion of beam test
    • Rates 70984 (Ilya) Presented TOF rates from test in December
    • [1] TOF occupancy for horizontal and vertical scintillators and ratio
    • Mark: Could be that the center 4 channels are ones that Beni identified as problematic at this morning's RC meeting
    • Another explanation is that the horizontal counters are unshielded by the horizontal gap on the beamline between the two DIRC bars.
    • We need to check with Beni about which channels are problematic and whether this problem is new or existed in December.
    • Slides on DIRC Geometry (Elton)
    • Collected some information on the DIRC, but more details are needed, especially gap along the beamline.
  6. Other business
  7. Next meeting