September 20, 2017, Production & Analysis Working Group

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Meeting Time and Place

The meeting will be on Wednesday September 20, 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] 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.

Reconstruction & Analysis Studies Status

Agenda

  1. Announcements
  2. Data Production
  3. Analysis Focus
  4. This Week's Studies
  5. Any other studies
  6. 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. Processing Update --- Alex Austregesilo
  3. Calibration Update --- Sean Dobbs
  4. Simulations Update --- Sean Dobbs

Analysis Focus: Total Cross Sections, Acceptance Corrections

  1. J/Ψ, φ --- Lubomir
  2. η, ρ, ω, φ --- Simon
  3. φ --- Thomas
  4. ω --- Cristiano
  5. η' --- Marouen
  6. Any others?

Studies: Miscellaneous

Updates on experiment, simulation, and the comparison between the two.

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

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: 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 week after next: 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

The following week: Alignment & Track/Shower Efficiencies (i.e. Is the detector working?) Updates on experiment, simulation, and the comparison between the two.

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

Minutes

Data Production

  1. Monitoring Update --- Thomas noticed that in recent weeks, the number of omega's per 1k triggers had steadily dropped from 0.6 to 0.57. Paul and Sean pointed out that these were likely correlated to actual changes in sim-recon.
  2. Processing Update --- Alex A. reported that the monitoring run ver19 on the 2017 data was completed. It was a baseline for preparing for the next reconstruction launch. ver21 is on the farm, including changes to FCAL calibrations, CDC dE/dx changes, and a new BCAL charged track clusterizer.
    • Also, he reported that after a discussion in the offline group about how to increase effective use of the JLab farm, it is requested that users not submit their own jobs to run over the REST data anymore. A combined run will be planned at the end of every month, and users should submit their plugins to Alex. He will organize additional runs on request.
  3. Calibration Update --- Sean reviewed the preparations for the next reconstruction launch. This launch is now planned for just after DNP - it is hoped that the FCAL issues can be reasonably resolved by then. The current monitoring launches will be used to update calibrations and fixed bugs. Several features in the data should be understood, and help was requested in studying them.
    • Paul M.: send out some plots related to the features that are not understood.
    • Paul M.: Will we process 2016 data as well? A: Yes, the inner FCAL blocks need to be recalibrated and we still don't understand the differences between it and the 2017 data. It's worth the ~10% hit in time.
  4. Simulations Update --- Sean reported that a minor FDC bug is fixed. A large bggen run is planned once the next version of the trigger simulation is checked in. Sean and Mark Ito are coordinating this. Please send any special requests to them.

Analysis Focus: Total Cross Sections, Acceptance Corrections

  1. J/Ψ, φ --- Sean reported that studies continue with higher statistics channels.
  2. η, ρ, ω, φ --- Simon is comparing phi -> K+K- with Thomas.
  3. φ --- Thomas is revisiting his handling of Lambdas after looking more closely at a bump that he thought was due to mis-ID'd protons.
  4. Reinhard asked a question about how to analyze thrown particle information in order to get information needed for acceptance corrections. It was suggested that he send the question to the Software Help email list, but one answer involved mcthrown_tree.

Studies: Miscellaneous

  1. Track / Hit Matching: BCAL, FCAL, TOF, SC --- Simon is working on updating the track projections to other detectors using information from the Kalman filter.
  2. Efficiencies: TOF, SC
    • Beni - the last wide panel near the beam hole in the TOF has a larger drop in efficiency than expected, this is likely due to rates, but not understood. Looking at this in simulation is on Beni's todo list.
    • Mahmoud - Work is ongoing on the SC efficiencies. It needs more discussion in the SC working group (meeting tomorrow).
  3. BCAL charged track clusterizer - Mark D. will take a new look at the covariance matrices. Paul M.: Does it also improve the timing? MD: Understanding of BCAL timing is elusive. But it should help.
    • Justin: is there a test plan for checking this change and updating calibrations? Elton: will discuss this tomorrow.
  4. Mark D. and Justin have done a lot of work to study the rate of reconstructed particles normalized to photon flux and the number of triggers. Most of the meeting was spent digesting and discussing this information. Few hard conclusions were drawn, but many ideas for future studies were raised.