September 6, 2017, Production & Analysis Working Group
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Contents
Meeting Time and Place
The meeting will be on Wednesday September 6, 2017 at 2:00 pm EDT. For those people at Jefferson Lab, the meeting will be in room F326.
Meeting Connections
- To join via a Web Browser, go to the page [1] https://bluejeans.com/115815824.
- To join via Polycom room system go to the IP Address: 199.48.152.152 (bjn.vc) and enter the meeting ID: 115815824.
- 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
- More information on connecting to bluejeans is available.
Reconstruction & Analysis Studies Status
Agenda
- Announcements
- Data Production
- Analysis Focus
- This Week's Studies
- Any other studies
- 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
- Monitoring Update --- Thomas Britton
- Processing Update --- Alex Austregesilo
- Analysis Launch --- Paul Mattione
- Calibration Update --- Sean Dobbs
- Simulations Update --- Sean Dobbs
Simulation Reports
15 Minute summaries of progress and future plans on the 2017 mcsmear Workplan.
Analysis Focus: Total Cross Sections, Acceptance Corrections
- J/Ψ, φ --- Lubomir
- η, ρ, ω, φ --- Simon
- φxsec --- Thomas
- ω --- Cristiano
- Any others?
Studies: Hit Efficiencies & Triggering
(i.e. Is the detector working?) Updates on experiment, simulation, and the comparison between the two.
- Trigger emulation --- Alex Somov
- Triggering efficiency --- Alex Somov
- CDC Hit Efficiencies --- Naomi Jarvis
- FDC Hit Efficiencies --- Alex Austregesilo
- BCAL Hit Efficiencies --- Elton Smith
- FCAL Hit Efficiencies --- Jon Zarling
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: Alignment & Track/Shower Efficiencies (i.e. Is the detector working?) Updates on experiment, simulation, and the comparison between the two.
- Drift chamber alignment --- Mike Staib, Alex Barnes
- Tracking Efficiencies --- Paul Mattione, Cristiano Fanelli
- BCAL Shower Efficiencies --- Elton Smith
- FCAL Shower Efficiencies --- Jon Zarling
The week after next: Other Updates on experiment, simulation, and the comparison between the two.
- FCAL Shower Efficiencies --- Jon Zarling
- Track / Hit Matching: BCAL, FCAL, TOF, SC --- Paul Mattione, Simon
- Efficiencies: TOF, SC --- Beni, Mahmoud
- Means & Resolutions (time, energy, dE/dx): Tracking, BCAL, FCAL, SC, TOF
- Uncertainties: PID (BCAL, FCAL, TOF, dE/dx), Kinfit (BCAL, FCAL, tracking)
- Channel/Analysis Studies: Branching ratios, cross sections, SDMEs, beam asymmetries
- Other reconstruction/analysis issues
The following week: Beamline & Triggering
- Flux --- Justin
- Beam energy --- Beamline Group
- Polarization (TPOL & lineshape) --- Beamline Group
- Beam Asymmetries --- Alex Austregesilo
- Trigger emulation --- Alex Somov
- Triggering efficiency --- Alex Somov
Minutes
Data Production
- Monitoring Update --- Thomas: Same as usual.
- Processing Update --- Paul M.: Analysis launch has finished. There are some potential issues with neutral-containing final states, may have to re-run these.
- Sean: When can we have another monitoring launch? Paul M.: Alex A. is coming back on Thursday, coordinate with him on Friday or Monday.
- Calibration Update --- Sean: Coordinating calibration updates from various groups, working towards a stable set for a new reconstruction run.
- Simulations Update --- Sean: Finishing off integrating some CDC updates, trigger simulations, and changes to the HDDM event model to store pulse peak information. A few more are in the works. Plan is to finish these studies then do another mini-launch before performing another full launch. Accurate trigger simulation is a must for physics analyses.
- Also looked at some early results by Naomi on CDC per-straw efficiencies. Threshold updates (first since ~2007) lead to slightly lower efficiencies, trying to understand drop in efficiency in outer rings, but it's likely a quirk of the tracking information passed to the calculation.
Simulation Reports
Will revisit these after the next mini-launch.
Analysis Focus: Total Cross Sections, Acceptance Corrections
- J/Ψ, φ --- Lubomir: Still need feedback from high-rate channels.
- φxsec --- Thomas: comparison of cross sections of phi -> K+K-, 3pi, eta gamma show:
- Difference between 2016 and 2017 results
- Dip near E(g) ~ 8.5 GeV only in K+K- final state, maybe a fitting issue?
- Difference between 2017 low and high rates only in K+K- final state
- Trying to understand these, many ideas thrown out. Efficiency calculations could be the cause. Paul M.: could try having Simon and Thomas analyze each other's final states
Studies: Hit Efficiencies & Triggering
(i.e. Is the detector working?) Updates on experiment, simulation, and the comparison between the two.
- Trigger efficiencies --- Alex Somov provided an update based on the new simulation code, looking at several final states
- Looking at exclusive omega -> pi0 gamma events, there is an overall reconstruction efficiency of ~50% (acceptance + reconstruction), trigger inefficiency is <1%.
- Eugene: Where does the inefficiency come from? Paul M.: Would be good to look at p-theta plots of reconstructed particles to see there are effects from e.g. photons converting in the FDC support structure.
- Exclusive rho -> pi+ pi- events have a trigger efficiency of ~90 - 95%.
- Looking at exclusive omega -> pi0 gamma events, there is an overall reconstruction efficiency of ~50% (acceptance + reconstruction), trigger inefficiency is <1%.
- FCAL Hit Efficiencies --- Mike Staib pointed out that there are some gain pathologies in ~10 blocks in the inner rings for 2016 data. Will discuss more in Calorimetry meeting tomorrow, but a good idea to use fiducial cuts to exclude this area.
