Jan 25, 2022 PrimEx-eta (informal) Calibration & Analysis Meeting

From GlueXWiki
Revision as of 13:31, 25 January 2022 by Ijaegle (Talk | contribs) (Minutes)

(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
Jump to: navigation, search

Time and Place

  • Time: Tuesday, Jan 18, 2022 at 9:30 am EST.
  • Room: Online

Meeting Connections

Join ZoomGov Meeting https://jlab-org.zoomgov.com/j/1603338968?pwd=RE82K09ocHlMUVdVZXAwRTh1ZmF6dz09

Meeting ID: 160 333 8968 Passcode: 237672 One tap mobile +16692545252,,1603338968# US (San Jose) +16468287666,,1603338968# US (New York)

Dial by your location

       +1 669 254 5252 US (San Jose)
       +1 646 828 7666 US (New York)
       +1 551 285 1373 US
       +1 669 216 1590 US (San Jose)
       833 568 8864 US Toll-free

Meeting ID: 160 333 8968 Find your local number: https://jlab-org.zoomgov.com/u/abf7wcfSu1

Join by SIP 1603338968@sip.zoomgov.com

Join by H.323 (US West) (US East) Meeting ID: 160 333 8968 Passcode: 237672


  1. Announcements
  2. Status of Calibrations
  3. Calibration Updates:
  4. Analysis Updates:
    • Drew
    • Tyler
    • ig
  5. MC simulation Updates
    • Production (ig)
      • New samples for eta & pi0


Presents: Alex, Drew, Jackson, Simon, Tyler, & ig

  • How to veto tracks? By Simon.
    • DChargedTrack object list all track hypotheses, the best hypotheses should be sorted then
    • DTrackTimeBased object list tracks with matching hit in other (fast) detectors, the time of this (fast) detector is then used as the track time
    • Drift time is too long to be used with RF hence DTrackTimeBased
    • To veto tracks we can either use
      • DChargedTrack/DTrackTimeBased by requiring no tracks corresponding to these cuts
      • Or zero DTrackTimeBased
      • We can also use lower-level object: DFDCSegment_factory and request no segments "fired"

Veto efficiency systematics might be a problem in all 3 cases. In short, we have to try the different track-based veto possibilities

  • Calibration status
    • Tagger (Tyler), microscope time-walk has been published last Friday, Tyler is currently checking its application. Tyler will take over Sasha for the tagger fine-tuning i.e. correct misaligned individual tagger channel
    • CCAL (Drew). Compton events are used for the calibration. Drew roughly two weeks to finish the calibration
    • FCAL (ig), gains matching should finish this week for both PrimEx-eta phase 2 and SRC data sets. Calibration is on track to be finished between mid-Feb and end-Feb
    • Alignment (Drew). Drew analysis is not in agreement with Simon. We have to decide which values to use
  • Analysis
    • Compton paper, what is missing? (Drew & Sasha)
      • Matching MC simu & data is still a problem. Drew will try to fold a fudge factor in the final observed quantities eg DeltaK
      • Alignment between CCAL/FCAL/beam is an issue
  • MC simulation (ig): new samples are available for validation. Once validated by Drew & Tyler, ig will launch a MC simu. production most probably after Sasha will finish the PS calibration on gxproj2
  • Skimming two-photon events will start afterward (probably in two weeks for now)