July 26, 2017, Production & Analysis Working Group

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Meeting Time and Place

The meeting will be on Wednesday July 25, 2017 at 2:45 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 Update --- Lubomir
  2. η, ρ, ω, φ update --- Simon
  3. φ --- Thomas
  4. ω --- Cristiano
  5. ω --- Mike
  6. Any others?

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 [2]
  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

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 reconstruction 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

  • The reconstruction of the Spring 2017 data has completed, with the REST files taking about 117TB. The coherent-peak skim data is about 30TB.
  • Due to the scientific computing network outage over the weekend, the analysis launch will begin on Monday.
  • The ReactionFilter channels have all been tested and are working with the new analysis library, but the user-submitted plugins still need to be checked.
  • The new analysis library had memory usage issues, but they have since been resolved.
  • Plugins for the following analysis launch should be submitted to Alex A. by Wednesday next week.

Analyses

  • Lubomir presented a comparison between the 2016/2017 data for J/psi and phi -> e+/-. For 2017, the yields appear to be lower than expected and the widths wider, although there are large uncertainties on these values so they are technically within agreement.
  • Simon and Thomas presented their latest results on the phi cross sections. There is still significant disagreement between the different decay modes, but they are getting closer. They are still working on studying the acceptance, including what effect the cut on the kinematic fit confidence level has.

Studies

  • Mark Ito showed Beni's studies of the TOF efficiency. The efficiency agreement between experiment and MC is pretty good, except near the beam hole where the PMTs became saturated.
  • Mahmoud showed his results for the SC efficiency. For the experiment, he sees the best efficiency in the straight section and the worst in the nose, but in the MC it is the opposite. However, he needs to fix his delta-t calculation in order to accidental subtraction correctly. He is also going to look into how the efficiency depends on track momentum.