May 10, 2017, Production & Analysis Working Group

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Meeting Time and Place

The meeting will be on Wednesday May 10, 2017 at 2:00 pm EDT. For those people at Jefferson Lab, the meeting will be in room F326.

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: 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.

Reconstruction & Analysis Studies Status


  1. Announcements
  2. Collaboration Meeting May 15-17, 2017
  3. Data Production
  4. Analysis Focus
  5. This Week's Studies
  6. Any other studies
  7. Upcoming Study Schedule

This Week's Topics

  • Talks: Summary/overviews only. Detailed discussions should be held in the appropriate working groups.
  • Talks should be limited to 10 + 5 minutes.

Data Production

  1. Monitoring Update --- Thomas Britton
  2. Calibration Update --- Sean Dobbs
  3. Preparing for the last Spring 2016 production launch
  4. Preparing for the first Spring 2017 production launch
  5. Processing Update --- Alex Austregesilo

Analysis Focus: Total Cross Sections

  1. J/Ψ, φ --- Lubomir
  2. η, ρ, ω, φ --- Simon
  3. [2] φ --- Thomas
  4. ω --- Christiano
  5. Any others?

Alignment & Track/Shower Efficiencies

(i.e. Is the reconstruction working?) Updates on experiment, simulation, and the comparison between the two.

  1. Drift chamber alignment --- Mike Staib
  2. Tracking Efficiencies --- Paul Mattione
  3. BCAL Shower Efficiencies --- Elton Smith
  4. FCAL Shower Efficiencies --- Jon Zarling

Data Production Milestones

  1. Produce Spring 2016 "gold runs" as soon as alignment is ready
  2. Mon. May 8 -- Fri. May 12 (?) - Scicomp tape library down
  3. Mon. May 14 - Fri. May 19 - Finalize calibrations/software for 2017 data. Run final tests.
  4. Mon. May 21 - Start production of 2017 data.
    • Two groups: low-rate and high-rate data.

Upcoming Study Schedule

  • Updates on experiment, simulation, and the comparison between the two.
  • Summary/overviews only. Detailed discussions should be held in the appropriate working groups.
  • All talks should be limited to 10 + 5 minutes.

Next Week: Studies: Other Updates on experiment, simulation, and the comparison between the two.

  1. Track / Hit Matching: BCAL, FCAL, TOF, SC --- Paul Mattione, Simon
  2. Efficiencies: TOF, SC --- Beni, Mahmoud
  3. Means & Resolutions (time, energy, dE/dx): Tracking, BCAL, FCAL, SC, TOF
  4. Uncertainties: PID (BCAL, FCAL, TOF, dE/dx), Kinfit (BCAL, FCAL, tracking)
  5. Channel/Analysis Studies: Branching ratios, cross sections, SDMEs, beam asymmetries
  6. Other reconstruction/analysis issues

Week after next: Studies: Beamline & Triggering

  1. Flux --- Justin
  2. Beam energy --- Beamline Group
  3. Polarization (TPOL & lineshape) --- Beamline Group
  4. Beam Asymmetries --- Alex Austregesilo
  5. Trigger emulation --- Alex Somov
  6. Triggering efficiency --- Alex Somov

The following week: Studies: Hit Efficiencies (i.e. Is the detector working?) Updates on experiment, simulation, and the comparison between the two.

  1. CDC Hit Efficiencies --- Naomi Jarvis
  2. FDC Hit Efficiencies --- Alex Austregesilo
  3. BCAL Hit Efficiencies --- Elton Smith
  4. FCAL Hit Efficiencies --- Jon Zarling


Data Production

  1. Sean presented the current calibration status. Aside from a few scattered problems, the last calibrations that need to be done are minor changes to the CDC time-to-distance calibration and to check that the covariance matrices are reasonable. Beyond that there are some minor improvements possible, but we should be ready for an initial processing of the data.
    • The current plan is to start production of the 2016 data as soon as the tape library is ready (Mike S. just needs to make a few minor changes). The 2017 data will require one more monitoring run. The aim is to be ready the Monday after next (May 21) to start production of the 2017 data.
    • Sean pointed out a few reconstruction features that need to be understood, including wrongly-timed SC hits, miss-ID'd RF buckets, and TAGM resolutions and shifts.

Analysis Focus: Total Cross Sections

  1. Simon has promised to send Sean some cross section summary plots no later than 10 minutes before he gives his Monday talk.
  2. Thomas showed some initial results on phi -> K+K- cross sections. He generally gets agreement within a factor of 2, and the agreement at higher photon energy is better. He is working on studying the efficiency in more detail and understanding the odd apparently tagger-dependent effects. A closer comparison with Simon's results in some bins was suggested.
  3. Cris mentioned that they recently noticed a drop in MC-determined efficiency for his omega analysis, which is being investigated, but also motivates the effort to determine efficiencies from data.

Alignment & Track/Shower Efficiencies

  1. Mike S. made some minor shifts in the FDC package alignment which yielded some slight improvement, but the few remaining inconsistencies in the pull distributions remain.
  2. Jon Z. showed some initial resolutions for FCAL shower efficiencies as a function of shower energy, using omega -> pi+pi- pi0 decays with one photon missing. He plans on making some changes to the analysis and efficiency definition to have more robust results, but this seems like a solid basis for an efficiency determination.