August 9, 2016, Analysis Working Group

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Meeting Time and Place

The meeting will be on Tuesday August 9, 2016 at 1:30 pm EDT. For those people at Jefferson Lab, the meeting will be in room A110.

Meeting Connections

  1. To join via a Web Browser, go to the page [1] https://bluejeans.com/115815824.
  2. To join via Polycom room system go to the IP Address: 199.48.152.152 (bjn.vc) and enter the meeting ID: 115815824.
  3. To join via phone, use one of the following numbers and the Conference ID: 115815824.
    • US or Canada: +1 408 740 7256 or
    • US or Canada: +1 888 240 2560
  4. More information on connecting to bluejeans is available.

Agenda

  1. Announcements
  2. Analysis Launch Status
  3. Reconstruction Studies: Schedule
  4. AOB

Minutes

  • Analysis Launch ~85% complete
  • SC Efficiencies: No update, Mahmoud at Gordon Conference
  • CDC Efficiencies: Mike showed that the # of low-efficiency channels is consistent throughout the run. He and Sean will look into adding them to the MC.
  • FDC Efficiencies (Alex):
    • The improvements in the track reconstruction have corresponded to improvements in the FDC pseudo-hit efficiencies. They are now roughly ~90% in the healthy regions of the detector.
    • For tracks that pass near the wires in the FDC, the hits are often not reconstructed.
  • Tracking (Paul):
    • The missing mass vs beam energy distributions (for all topologies) have a sharp change near 4.2 GeV. This indicates an inconsistency with the TAGH beam energies. Nathan will look into it.
      • The other irregularities in these plots may be due to not subtracting the accidentals. Paul will try this next time.
    • Paul showed tracking resolutions, but they are topology dependent: The resolutions are computed by comparing the reconstructed momentum to the missing momentum, and the missing momentum is topology-dependent. Thus they are difficult to interpret, and it will take some work to deconvolve the contributions to the resolution from the missing momentum.
    • To compute the tracking efficiencies, the sideband subtraction is proving difficult, and is not ready yet.
  • FCAL Neutral Efficiencies: Jon is having some issues with large backgrounds at low energies, and is working on improvements.