June 21, 2016, Analysis Working Group

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Meeting Time and Place

The meeting will be on Tuesday June 21, 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. REST Production Status:
    • First run block: 11347-11555 (complete)
    • Second run block: 11556-11678 (complete)
  3. REST Production Preparations:
  4. Reconstruction Studies:
    • CDC Efficiency: Mike
    • FDC Efficiency: Alex A.
    • BCAL Hadronic Energy & Efficiency: Elton
    • BCAL Neutral Energy & Efficiency: Will
    • FCAL Hadronic Energy & Efficiency: Matt
    • FCAL Neutral Energy & Efficiency: Jon
    • SC Efficiency: Mahmoud
    • TOF Efficiency: Beni
    • Tracking Means, Resolution, & Efficiency: Paul, Simon
    • Beam Energy Scale: Nathan, Richard
  5. Other Studies:
  6. Analysis Launch Preparations:
  7. AOB

Minutes

  1. REST Production Status:
    • The production of the first and second priority run blocks (11366-11678), with no significant issues to report. Total size of the REST files is ~18 TB.
  2. REST Production Preparations:
    • Spring 2016 Dataset Summary and Trigger Summary:
    • Third run block: 10331 - 10913
    • Fourth run block: 11059-11346
    • Calibrations and detector group status reports
      • Updates to timing calibrations (TAGM, TAGH, PS and other misc.) are proceeding well and expect to be finished in 1-2 days if not already completed.
      • Naomi reported difficulties in calibrating the CDC gains for some of these early runs due to non-optimal HV, non-optimal thresholds, and missing straws. She provided a list of problematic runs which may be removed from approved run list to avoid complications.
      • Adesh reported that FCAL non-linear corrections are completed and just need to be uploaded to CCDB
  3. Reconstruction Studies:
    • It's understood that the launch just recently completed, and there may not be much to report yet on these topics. That said, we felt this meeting was a good place to regularly summarize the important developments in the reconstruction studies from the various groups in one place.
    • CDC Efficiency: Mike
      • Efficiencies will be studied with the same plugin as previous datasets, but haven't had time to work on yet.
    • FDC Efficiency: Alex A.
      • Discussed at the last tracking meeting. Timing calibration is needed and modifications to the reconstruction and tracking code underway for future REST productions.
    • BCAL Hadronic Energy & Efficiency: Elton (Nothing to report)
    • BCAL Neutral Energy & Efficiency: Will (Nothing to report)
    • FCAL Hadronic Energy & Efficiency: Matt (Nothing to report)
    • FCAL Neutral Energy & Efficiency: Jon
      • Discussed at the last Calorimetry meeting
      • Using omega -> 3pi, tagged missing photon events. See Calorimetry meeting minutes for more details.
    • SC Efficiency: Mahmoud (Nothing to report)
    • TOF Efficiency: Beni
      • Discussed at the last TOF meeting
      • A reduction in gain is observed over the course of the run period, while some paddles see a strong run-by-run dependence of the MPV of the landau fit
      • The time resolution therefor may have a paddle and run dependence with the current calibration. Improvements in the calibration may come from incorporating pedestal shifts in the procedure.
    • Tracking Means, Resolution, & Efficiency: Paul, Simon (Nothing to report)
    • Beam Energy Scale: Nathan, Richard (Nothing to report)
  4. Other Studies:
    • Triggering Efficiency: Alex S., Justin, Elton
    • Beam Polarization: Justin, Nathan
      • The rho asymmetry is being studied with the full statistics sample for comparison to the TPOL results, and so far agreement is reasonable with slightly smaller asymmetries for the rho in the coheren peak region.
      • A small, but non-zero asymmetry (~5%) below the coherent peak (E<6 GeV) has been observed, and is being investigated.
    • Flux: Justin (Nothing to report)
  5. Analysis Launch Preparations:
    • With the completion of the REST productions, we anticipate Analysis Launches where users can submit their plugins to be run over the data and produce TTrees for further analysis.
    • Some plugin requirements were suggested for users to consider as they prepare their individual plugins.
    • If users from a working group are doing similar analyses, they're encouraged to discuss using the same plugin and TTrees for their analysis.
    • In terms of computing resources for the Analysis Launch we would like to utilize EventStore skims. Richard and Sean are working on implementing the necessary software.
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